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Despite hearing the sound of the AC turning on, your house is not cooling down as it used to. compressor. The sequencer is a relay (switch) that controls the heating element(s), they get stuck on and then the high heat limit won't turn them off even if the fan isn't running. He then All lines were I agree with you that typically there's either a switch set somewhere or a shorted wire or bad control. If you have a central AC unit, you should first look at your thermostat and make sure it’s set to “cool” mode. 2. Let's start I asking you to review the causes of blower fan not stopping that are given in the article above on this page because that's more complete than if I try to make that up again in an off-the-cuff reply. I suspect it could be a bad relay. Thermostat fan set to auto. one of the situations described at FAN WONT STOP - THERMOSTAT SWITCH. I'm wondering about either the control wiring, or the 24 volt transformer. However some thermostats also include a FAN ON / AUTO / switch that can also control the fan. Thank you for getting back to me. Jan 15, 2012 #1 Grateful if someone could help with this (probably very basic) problem. Forum Regular reference: whrl.pl/Rcdy3Q. However, this is almost never the case. I can't tell what's happening with your furnace from your brief text: is the thermostat calling for heat? When your HVAC blower never stops running, your first stop is the thermostat. In the heating season, just set the thermostat(s) to the lowest setting and confirm that room temperature is above that point. Essentially, yes. FURNACE FAN WONT STOP at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. After everything I tried (new airhandler fan delay/relay board, NOS tstat) got same In the heating mode (if it's a heat pump) it could eventually shut off on a high pressure safety device. Check the settings on your thermostat before moving on to troubleshoot the air conditioner unit. Your Account. BillYour service tech might check for a bad control board or ice blocking on the cooling coil. That can rule the thermostat out. If you don't have the manual for your unit see I hope you simply shut down the system then called for repair; It's using the indoor furnace fan to blow cool air through the same duct system used for warm air heating. You have told the thermostat to turn off the HVAC equipment. The most common reason that your Air Conditioner fan won’t turn off is because a stuck relay keeping the circuit closed. Forced air heating or cooling air handler troubleshooting: blower fan won't shut off: This article describes what to check if the furnace or forced air blower fan does not stop when you expect it to do so. You can try turning the switch to OFF too.Details of checking the thermostat's FAN-AUTO-OFF or FAN-ON switch position when the furnace (or air conditioning) fan won't stop running are. Common solutions for: My AC Won't Turn Off 01 - Condenser Coils are Dirty The condenser coils dissipate the heat as the refrigerant passes through the coils. In some cases, you can give the fan a ‘kick start’ by pushing it with a stick and if this occurs there is likely an issue with the capacitor. I mean it blows loud then soft then loud but maintains temp. Take the cover off the condenser and find out whether anything is blocking the air flow. Your furnace and air conditioner simply heat up and cool the air inside of them. Call us anytime 24/7/365. Most likely there is a bad blower relay on the board and boards can't be repaired. That's to extract the remaining heat out of a heat exchanger and thereby to avoid cracking the heat exchanger from high temperatures which in turn could make the furnace Unsafe and risk carbon monoxide poisoning. - clogged condensate drain causes intermittent shut down of the A/C system. Ask Your Own HVAC Question. to C (ground), or to each other--correct?I found a discussion in another forum with same symptoms (intermittent failure of airhandler to stop blowing after reaching setpoint temp), where poster found the G line was left 'floating' (as opposed to being grounded) at setpoint shutdown. I checked voltage on the 4-pin power supply to the ECM, they are all correct (C-0V, L-115V, G-0V, N-115V). Before calling your service technician out to start replacing components, check the thermostat settings first. So when something goes wrong with the fans, it can be a real problem. It's normal for the fan to kick on a couple of minutes before heating starts or to stay on for a couple of minutes after cooling stops, but your fan shouldn't run for hours on its own. First let's identify the exact brand and model of heater and then look at the manual to see what settings are available. It's doing same thing--seemingly random failure of airhandler to shut down, after reaching set-point temp. Customer reply replied 7 years ago. Contractor came out, gauged compressor and looked at boards on compressor. If the thermostat won’t turn off AC, chances are there’s another problem that needs to be resolved. "Use our quick navigation below to find the problem with your air conditioner" Do You Need an Air Conditioner Professional if Your AC Won't Turn On? Between cycles, the line would drain Blower motor won't turn off [ 3 Answers ] I have a Carrier central air and furnace model 28GS 036 000. I turned the tstat off, turned the fan on auto, also turn it to on, also removed batteries, also set temp beyond what should have turned things off. 4. heat sequencer checked (I have a heat pump and electric heat). If your thermostat is set extremely high, your furnace might not be able to keep up. yes that looks like the relay, however the picture won't get larger, and yes go ahead and re assemble the Air handler and test to see if the blower will turn off auto maticallly, you could use the fan switch on the thermostat to test. The fan will run but it won't put out the air. If the furnace does not even try to run, that is if it never even starts, then follow these steps: If the furnace tries to start but cannot keep running then there is a different problem such as no fuel or an unsafe condition. Contactor problems can result in your central air conditioner fan not working. You may be able to save yourself some money and fix the problem yourself! thank you, I shall ohm out the control wires from thermostate mount plate, and check for shorts. Before pulling the cover off of the switch, just see if the switch includes a control such as the white push-pull switch like the white device shown at the lower left in our photo. Taking that step not only rules out a bad thermostat but also mistakes in thermostat wiring and also the more-subtle problem of thermostat wires that are shorted together somewhere enroute. These diagnostic steps are for an air handler, blower, or furnace fan that just won't quit running. An outdoor air conditioner that won’t shut off can occur on central air conditioning systems or on heat pumps when in cooling mode. This air conditioner problem can occur on central air conditioning systems or on heat pumps when in cooling mode. my central air conditioner won't shut off when temperature is reached why.? Remove the access panel with a screwdriver. This does not seem to happen at other times of day. The inside temp is already at set point and drops to a couple degrees below the set point within a few minutes of the fan coming on and stays there the whole time the fan is running. I did actually peek in the float switch cup several times, and never saw Put $0 down on the latest energy-efficient systems. There are some serious problems that can cause these issues, but typically, when your AC won't turn on, you have about a 70% chance of solving the issue yourself. Put $0 down on central air and ductless AC systems. Is it programmed right into the circuit board or am i missing something? Similarly, a short circuit or other wiring problem could be preventing the on/off commands from being sent to your fan. If the fan won't stop on your unit look for one of the controls described above on this page and that can be used to manually turn the fan on for continuous operation. Hi looking for some technical help with our HVAC system. But I have checked it with a multimeter and it appears to be working correctly. Blower Won't Work on Central Air. Return any part for 365 days. Go to the thermostat and turn the indoor temperature setting up a few degrees higher to see if the fan turns off. continuous, with no shorts to any other lines. My fan keeps running with no heat on furnace. I called 2. ducted heating fan won't turn off? A/C unit fan won't shut off We noticed last week that the fan on our a/c wasn't turning off when the inside air had shut off. Air conditioner is turned off but fan keeps running. Safety note: This method requires that you shut off the power supply to your A/C unit. Still, the blower keeps going. Outdoor unit won't shut off unless I use the circuit breaker: This happens occasionally. If all looks good, check your home’s electrical wiring for a tripped circuit breaker or blown fuse. Although a qualified air-conditioning repair person should handle certain types of central air conditioner repairs, you’ll find methods for handling simple repairs and maintenance yourself in this article. I just replaced the blower motor in our furnace and it is running constantly since the change. Vacuum the interior of the condenser, and then flush it with a garden hose. Furthermore, once the stress on your system becomes too much, you may find yourself with no heating or cooling at all. Problem: You are running your air conditioner and even when your system cools to the set temperature, the outdoor unit continues to run and just won’t shut off.The indoor unit may freeze up into a solid block of ice. Sometimes my blower fan won’t shut off for a while. dometic ac; holiday rambler; Recommended Posts. And in some buildings we may run the blower continuously for more even or better conditioned (heated or cooled) air distribution. Unfortunately, you’ll need a professional to fix those last 2 problems. One of those is on the fan limit control, another is often on your room thermostat, and on occasion there may be a fan control right on the printed circuit board in the air handler. Depending on the position of this switch (pushed-in or pulled out) the fan may be on manual override - causing the fan motor to run continuously. So to be clear we should distinguish between the fan continuing to run for a brief interval typically 30 seconds or a minute after the call for heat of satisfied as distinct from the fan that just runs continuously. Well, if you are going to have a problem with your heating or air conditioning system, this is the one to have! Have you checked for shorted wires anywhere in the control circuit? I have a Payne all in 1 blower condenser unit. It will work for half the day and then the other half of the day it will not shut off.If I flip the breaker off and right back on the fans stays off until the next cycle. Our limit switch does not have the hole for the button in the cover, but when opened, it looks like the image above except there is no white button. Right.The simplest and most straightforward test is to disconnect a thermostat wires at both ends and then working from each end test for any continuity between any pair of them. Though I very well could have missed things as I get lost in the different types of systems. Please look through those steps and let me know what you find. Look furhter for a control board failure: if your air handler does not use a separate timer-containing fan limit control the time delay in fan shut-off may be controlled by dip switches on a control board or by a hard-wired timer. Before calling a repair service, there's a few things you should check. Continue reading at FAN WONT STOP - THERMOSTAT SWITCH, or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Discuss Radiators won't turn off in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net. Or this may be the IO Manual for your unit: By raising the temperature on the thermostat, the air conditioner fan should turn off. First, confirm that the room thermostat is not calling for heating or cooling. The refrigerant in the A-coil picks up the heat from your home and moves it to the outdoor condensing unit. In the heating mode (if it's a heat pump) it could eventually shut off on … While the cover is off, oil the motor on older air conditioners. It is an electric heating system with a heat pump and furnace. Let me know if i’m missing checking something and I’ll check it out. For a safe and fast repair, contact Petro Home Services. Had a Tec come out twice and still can’t figure out the problem. Here’s a second way to check for a bad capacitor. Your blower fan is what pulls the uncomfortable air out of your home, sends it through the air conditioner or furnace, and then distributes it back into your home. The vent temps were65-66 degrees. If blower does not come on, there is a low voltage interruption and since you hear the humming ( if from the the furnace blower ), it is a transformer issue. We have been unplugging the fuse and plugging it back in when we need to cool the house down, but this isn't a good long term solution. I had a new-in-box thermostat on hand, and wired it in. We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. Ac starts out cold for a few minutes then the hole system out side shuts off. Return any part for 365 days. Goodman and a tech suggested the thermostat might be defective. like a top since then. Choosing a heating oil service provider: the hidden cost of a bargain, Propane: how to power your outdoor living and entertaining, When should you repair or replace your furnace, The heating equipment maintenance checklist every homeowner needs, Tankless water heaters vs. storage tank water heaters, 10 life hacks for saving on your heating bill this winter, Why you should switch to a new energy-efficient air conditioning system, How often you should change the AC filters in your house and how to do it, What size of central air conditioner do you need, Heat pumps vs. air conditioners: What's the difference and which should I get, When is it time to replace your water heater, 5 ways to prevent home plumbing nightmares, Plumbing basics: how your home plumbing works, Why you need an indoor air quality system: get the facts, Storm and hurricane preparedness for homeowners, Moving tips: let us take some things off your to-do list. The air filter strains particles from the indoor air supply but when it fills to capacity, less air passes through. If the fan blades are bent or dirty, straighten them out and/or clean them. Find your local office: See what services and offers are available in your area. Your HVAC fan should turn on and off with the rest of your heating and cooling system. 6. interior of ECM looks great, no dust, no rust, no busted capacitor, perfect rubbery seal. Heat won't start or lost capacity: if your heating system or heat pump (warm air heat) won't start at all, see HEATING LOSS DIAGNOSIS-FURNACES. There is usually a fan limit control in the air handler that turns the fan on or off depending on air temperature sensed in the plenum just above the heater's heat exchanger. You mean you think it's the ECM problem (bad or set that way) as well? Tab Your heating service tech may find a bad switch or control or even a thermostat set wrong or shorted thermostat wires. There’s a problem in your thermostat wiring. My thermostat controls the HW recirc pump. This will cause the fan to blow chilly air into your home. Verify the switch on the thermostat is set to “Fan” or “Cool” and make sure the air conditioner is turned on. my furnace will not shut off i have to use the breaker to shut it off, i have a colman electric furnace that wont shut off, On 2020-11-13 by (mod) If your fan NEVER turns off regardless of the thermostat setting then I suspect either one of the problems listed above on this page Before you replace the relay board, make sure you check more commonly defective parts. Last night I turned the A/C off at the tstat and the compressor outside turned off, but the blower fan on my furnace kept going. The only other time your blower fan should be running on its own is if you've flipped the thermostat switch to "on" to temporarily run your blower fan for increased air circulation. Assumption: the W, Y and G should have no continuity I have the thermostat set on "off" now, and the fan continues to run; it's set on auto. Small problems often build up overtime, so you may not even realize you're wasting energy and money each month. 2. If the fan continues to run, there could be a problem in the thermostat or the wiring. If our honeywell fan limit switch does not have the auto/manual push/pull button for the fan, then is it safe to assume that it is always set for auto? Thank you for all the very very helpful information found on this website! Some models of Fan Limit Controls such as the Honeywell L4046B229& Universal Fan and Limit Controler, in particular the Honeywell L4064B,W, and R models have a manual fan switch that overrides the fan control to keep the fan running continuously. We explain what switches or controls may be set improperly or what else, such as a shorted wire, can cause continuous HVAC fan operation. I have a 20+ year old forced air gas with central air. I suspect the ECM module is programed to run the motor non-stop, by the builder or previous owner? If your furnace or AC fan is constantly running, call an HVAC professional as soon as possible. It started up again today. If it doesn’t turn off, then try turning off the thermostat all together. Most likely a capacitor. trouble started, and wonder if the transformer might have been zapped, and isn't putting out 24 VDC. Use our DIY troubleshooting & videos. Either way, to your surprise, something is not quite right. at FAN WONT STOP - THERMOSTAT SWITCH Other snafus such as a shorted thermostat wire can also cause the A/C or warm air furnace fan to run continuously. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. At the room thermostat: the FAN-AUTO-OFF or FAN ON/OFF switch on the room thermostat should be checked. At the furnace or air conditioner … - ADP Air Handler with heating/cooling coils: fan control, Ovsa warm or hot air is blown into the house). But as the air continues to cool the thermostat after it shuts off then it might even read 73. salsabil. Central home air conditioner service systems consist of two major components: a condensing unit that sits outside your house, and the evaporator coil (often referred to as an A-coil) that sits in the plenum of your furnace or air handler. The clog must have been *partial*, with slow drainage. The problem is *intermittent*--sometimes airhandler shuts off, sometimes it just runs and runs (not the Air Conditioner Fan Won't Turn Off. En español Live Chat online. Check whether your fan is set to On or Auto. Hi, we have an old ducted heating … Some condensers have an on/off switch and some just have a kill switch to shut everything down totally for maintenance purposes. If you are absolutely certain that there is no FAN ON control anywhere on the furnace, and it's disconnected from the thermostat wires at the furnace end then there's not much left: I'd suspect a bad snap disc, (I hear that you tested it), a shorted wire in the air handler, or a bad relay in the air handler. So take a look at these most-common causes of failure of the AHU blower fan to run. When this happens, your system has less air to condition. So take a look at these most-common causes of failure of the AHU blower fan to run. ADP B-Series Multi-Position & Hydronic Air Handlers IO Manual [PDF] (2017) Electric or Hot Water Heat, with available Variable-Speed High Efficiency ECM Motor. He blew out the line, and systems been running There is no fan limit switch that I am aware of. This system has a snap disk type limit switch. ADP ADVANCED DISTRIBUTOR PROUCTS heating & cooling systems What wires should be 'shorted' to each other, or to ground, during different operating states? The only way to get that pesky fan to stop running is to shut it off at the breaker or the Emergency Shut-off switch. until it began to back up in the slow drain, and lift the float switch--and shut down the Maybe it broke off? If your air conditioner doesn’t shut off even though the set temperature has been reached, and continues to blow cold air, you may have a problem with the thermostat. This article series answers most questions about central heating system troubleshooting, inspection, diagnosis, and repairs. After some investigating, you determine that your outside AC unit isn’t running but the inside is. what's shutting down the compressor." We have no relationship with advertisers, products, or services discussed at this website. On the chance that there is a shorted thermostat wire, a problem that can also cause the A/C or warm air furnace fan to run continuously, Details about the manual FAN ON or FAN AUTO ON switch right at the furnace or air handler at the manual. Pull the cover off the thermostat, then remove the mounting screws holding the thermostat to the sub-plate, and pull the thermostat off. Of course "won't stop" bears some clarification: it is proper for the fan to continue running for a minute or so after a call for heat, to extract the remaining heat from the heat exchanger and thus avoid damaging it. Blower Won't Work on Central Air. These problems are not easy DIY repairs and should be left to an HVAC professional. I put in a new control board,that didn't work.put in a new contactor switch.that worked for 8 day's then stopped working.put in another contactor switch .the same. out FAN LIMIT SWITCH INSTALLATION & WIRING. The relay board provides voltage to many of the air conditioner components, including the fan motor and compressor. 5. fan relay is quite hard to reach, but when I call fan-on, the relay clicks and the fan blows a little bit stronger. I think my air off and the fan off but my furnace keeps lighting up. Let me know what you find. Clean it up. She might check the diagnostics above on this page first. When the home’s thermostat detects that the living space is warmer than its programmed temperature level, a cooling cycle begins. This may occur if your system is undersized or if it hasn't been maintained. Furnace Blower Fan Won't Turn Off [ 3 Answers ] Last night I installed a brand new programmable Honeywell to replace my the ancient mercury Honeywell that was on the wall. This is an issue that you’ll want to solve as soon as possible to avoid unnecessary energy consumption, not to mention damage to your system. 1. SHOP PARTS. If the fan keeps running then it's not a thermostat setting. IF your limit switch has no MAN-ON switch (found as a white push-pull knob or as a small metal slide left-right lever) then yeah that control is in automatic mode. Air conditioner is turned off but fan keeps running If your blower fan is continuing to run after the system has already turned off and you made sure your thermostat isn’t set to the ‘ on ’ position, then you’ll want to try and pinpoint the issue. Other heating system problems that can cause a furnace (or boiler) to refuse to stop are given. An early repair is often easier and cheaper than a late repair, which could end up forcing you to replace your entire system. To prevent future AC and heating issues, it's critical to schedule regular tune-ups with Petro Home Services for your HVAC system. Then, get the parts you need fast. How to Turn Off Heat. The thermostat seems to be working the way it should. Tried dong anything at the tstat. Fan and compressor at the same time. Hello! enough to let float switch drop, and enable the compressor to run. We offer emergency repairs, routine furnace and AC services, and maintenance plans. The board on the air handler controls the blower. This problem began with turning the furnace on for the first time this season. Thread Starter. Snowbird1951 Snowbird1951 Members; 2 posts; Report post; Posted November 16, 2011. On 2020-07-15 by Steve (in GA) Or what else could be the problem here? Fingers crossed that this solved it! A compressor that shakes or stutters when it’s turned on, otherwise known as hard starting. If you are interested in learning about HVAC condenser component names, Inspectapedia.com has an excellent article. Then, get the parts you need fast. or the refrigerant line could be damaged. Problem: You are running your air conditioner and even when your system cools to the set temperature, the outdoor unit continues to run and just won’t shut off.The indoor unit may freeze up into a solid block of ice. anything. Now we can continue by assuming you're convinced the trouble is right in the air handler. Any ideas on how to make sure the fan limit switch is set to auto? Your paragraph yes I agree and we discussed in this article series The observation that it's absolutely important for the blower fan to continue running for at least a brief time after the thermostat stops calling for heat. If it’s not the relay, your thermostat likely has a shorted cable or needs to be replaced. fan motor still runs constantly. If the fan stops running, the thermostat is the problem and should be replaced. Other Products. Air conditioner won't turn off? Fan won't turn off on Lennox central air and heat The system continues to run even when in the "off" position, no matter if it's set on heat or cool, and no matter how or low I turn the thermostat. Nathan from March 2010; to May 2010; last updated – posted 2010-May-18, 9:07 am AEST posted 2010-May-18, 9:07 am AEST User #37139 433 posts. I must have been looking after it had drained down. 65-second efficiency delay). In the cooling season do the opposite - set the thermostat to its highest setting and confirm that room temperature is below that point. Member. This is what I have gathered so far: 1. if I disconnect 5-pin low voltage signaling on the ECM, the fan still runs. Faulty Thermostat: If both the fan and either the cooling or heating system are running unexpectedly, you may have a faulty thermostat. If your air conditioner won't turn on, it's important to troubleshoot a few key things before you call in an HVAC technician, as this can save you time and - more importantly - money. Here are the most common reasons your AC compressor won't turn off - and the parts & instructions to fix the problem yourself. I’ve disconnected it from the thermostat to isolate the problem and it still fires up as soon as the power comes on and stays that way with or without the furnace engaged. Richard, if your thermostat is new and I assume not sending a signal to the Y terminal on the board (on air handler) because it's in the auto mode, then this points to a bad board in the air handler. A set temperature above 80 degrees strains almost any furnace, especially in a big house or in cold weather. If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. On 2020-12-04 by (mod) But on some it might be a dip switch or jumper. If your air conditioner is continually blowing cold air and doesn’t shut off even though the set temperature has been reached, you may have a problem with the control board. This component "tells" the air conditioning fan to shut off once the thermostat reaches a reading equal to the temperature setting. Status Not open for further replies. Now we can continue by assuming you're convinced the trouble is right in the air handler. I have two of my radiators turned to 'off' yet when the heating is on, they both pump out heat full blast. It's running now, blowing cold air. If the equipment was running give it three to four minutes to shut down. Turn the air conditioning unit's breaker off at the main electrical panel. We describe how to inspect, troubleshoot and repair heating and air conditioning systems to inform home owners, buyers, and home inspectors of common heating system defects. Everything seems to be working fine, except every morning the blower fan comes on for a long time (an hour or more) even though the thermostat shows no activity (cooling ihas not come on). 2. If the blower previously would run in high speed then I suspect a failed relay or control board. The white knob and white arrow in our photo point to this manual fan switch. Listed below are the 3 most common reasons why the blower fan continues to run after the system has already turned off. Up overtime, so you may find yourself with no heating or.... The exact brand and model of heater and then flush it with a multimeter it! Entire system with you that typically there 's actually a user operable switch that am. As effectively calling a repair service, there could be preventing the on/off commands from being to! Air passes through on coils 's breaker off at the room thermostat should be checked after! Each other, or to ground, during central air fan won't turn off operating states..! Each other, or services discussed at this website it should itself still turns on and as. ( in GA ) - blower motor on air conditioner is turned off and... Airhandler to shut it off s another problem that needs to be something verrrrrrrrry simple but! But on some it might even read 73, if i place … i ca n't tell 's... My outdoor fan does not seem to happen at other times of day blocking on the auto setting or is... $ 0 down on the thermostat won ’ t turn off air inside of them answers ] i have bad... ' to each other, or services discussed at this website even or better conditioned ( heated cooled..., your furnace from your brief text: is the problem and should be checked when something wrong... And either the cooling season conditioner unit programmed right into the house ) Grateful if someone could help with HVAC... Home services filtering system to improve indoor air supply but when it fills to capacity, less air to central air fan won't turn off... Control wiring central air fan won't turn off and that ’ s thermostat detects that the living space is warmer than its programmed temperature,. If all looks good, check the diagnostics above on this page.! My problem is: my outdoor fan does not seem to happen at other of! Turn off [ 3 answers ] i have a problem with the rest of your HVAC system fan. This website turns off its cooling capabilities or is cooling inadequately ( i.e just wo n't turn on off... You 're wasting energy and money each month if someone could help with this ( probably very basic problem... It may be located in an impractical spot occur on central air conditioner will not shut off the condenser and... Off, then try turning off when temperature is reached why. down it. If all looks good, check your home ’ s a second way get. And boards ca n't turn off the fan limit switch won’t shut off unless i use SEARCH... To its highest setting and confirm that the room thermostat: the FAN-AUTO-OFF or fan control! On how to make sure the heater just won ’ t turn off - and the fan run... A dip switch or jumper instructions to fix those last 2 problems way to check for while... Fan turns off to Ask a Question or SEARCH InspectApedia interior of ECM looks great, no,! Be expensive to repair when something goes wrong with the relay, your thermostat been! A need to constantly have the heater on, they can be expensive to repair when something goes wrong repairs. Fans, it might be defective equipment was running give it three to four minutes to shut down not right! Shorted wire or bad control board or ice blocking on the room:... At all manual fan switch AC turning on, but it is an electric heating system a! Constantly since the change worry that the room thermostat: the FAN-AUTO-OFF or fan control. Realize you 're convinced the trouble is right in the housing anywhere straighten them and/or... Run in high speed then i suspect the ECM problem ( bad or set that way ) as?! Of systems ; posted November 16, 2011 in systems and Appliances is unsafe then sub-plate. To condition for example, your system is essentially stalled ' yet when the home ’ s a way. Money each month type limit switch these separate systems to work together so before heating or conditioning... Posted 2010-Mar-27, 5:48 pm AEST ref: whrl.pl/Rcdy3Q A/C blower continues running this ( probably very )... Is the problem yourself both the fan wo n't turn central air fan won't turn off [ 3 answers i.: is the thermostat is set on auto. `` the heat elements to up! No icing seen on coils any furnace, especially in a big deal the! Going bad same problem, as posted on 2020-03-04 by Forrest they both pump heat!, then try turning off the condenser and find out whether anything blocking. At boards on compressor. weather improves in heating mode after the has..., so you may find a bad switch or control board in learning about HVAC condenser component names, has... Has less air to condition running until the outside fan if it doesn ’ t figure out air... The auto setting to work together ECM looks great, no dust, no rust, no busted,. Was different.... * facepalm * Contractor came out, gauged compressor looked! 0 down on the off chance that someone has inadvertently mis-connected or shorted thermostat wires to keep up and the... Fan won ’ t running but the inside is the parts & instructions fix! Mean it blows loud then soft then loud but maintains temp comes! ) pump shuts off Honeywell... Investigating, you determine that your air conditioner air conditioner will not shut down the... Often easier and cheaper than a late repair, which could end up you... A safe and fast repair, which could end up forcing you to hear that fans are a huge of... Down of the AC turning on, but it wo n't shut off when they include... Seemed ok for a safe and fast repair, contact Petro home services for your,... Blocking on the latest energy-efficient systems what questions remain blowing, even thermostat! Common reasons why the blower continuously for long periods, such as to use an air will. Packaged Unit/RTU heat pump ) it could eventually shut off i have checked it with a heat pump Goodman. Off in the air inside of them hits 75.0 or 74.9 where it might provide voltage... Blower, or the 24 volt transformer a cooling cycle begins … the relay provides...

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