ac blower fan won't turn on

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. 1; 2; 3 ... With the fan switch on AUTO, the blower works fine in the AC mode. If it’s not the relay, your thermostat likely has a shorted cable or needs to be replaced. Before calling your service technician out to start replacing components, check the thermostat settings first. Share this conversation. Slide a long, thin wooden stick through the fan grate and gently push one of the blades to try to get the fan spinning. It is as if I had gone to the circuit breaker and cut the power to the whole HVAC system, but I didn't. ComfortZone. 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. In the heater mode, the burners fire but the fan doesn't come on. Question: I have a problem that may cause me to dump my 2001 330Ci, the electric suction radiator fan won't turn off even when the ignition is off, I was unplugging it so it wouldn't run the battery down when parked. If the furnace starts, the problem is either with the thermostat wire or thermostat. So, if the capacitor attached to your fan motor is bad, the fan won’t start spinning. I really did not look forward to finding the green wire and disconnecting it. … read more. 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. Walk to the AC/heating unit and listen for the motor to turn on. Look for a blown fuse or tripped circuit breaker. If I manually switch to the ON position, the fan runs. I replaced the fan/limit switch and verified that it works correctly. My blower fan for the heater/AC wouldn't turn off. Registered. When AC units run, they create condensation, which is removed from the unit through a drain line. SOURCE: 88 cadillac deville, ac blower fan wont shut off, Ralph, Most common cause of this is the blower fan (proper name for the fan you refer to) continuing to run is a shorted out Electronic Climate Control Module. The second common call is exactly the opposite problem — what if the HVAC fan won’t turn off? On some air conditioners the speed settings do not allow the fan or compressor to shut off. When a Car Fan Won't Blow . A furnace blower that won’t turn off will run up your energy bills and shorten the life of your furnace equipment (both expensive problems). When the drain line becomes clogged, a safety switch trips and shuts down your air conditioner. More modern gas furnaces will have a control board. Here's what I've done so far. The blower motor resistor or blower module gets hot as it powers the fan so, often times, they can burn out causing certain speeds of the fan in your car to stop working, the fan can be stuck on one speed, only work on high speed, or not work on any settings. AC unit won't turn on: both inside blower fan and outside fan unit won't turn on. All the normal AC lights come on on the dash, and I can hear the engine revs changing when the compressor kicks in, but no air comes from the vents at any of the 4 fan settings. Thanks to all with this info. So after having to reset all the clocks in the house I googled what to do. Check out what he's been through, and why he should have asked an expert from the start. Your furnace blower fan not starting can have a few causes as you see here. The most common reason that your Air Conditioner fan won’t turn off is because a stuck relay keeping the circuit closed. Today my car’s AC fan wouldn’t come on at any speed setting, only to come on later in the day… what could it be? Blower won't run when AC comes on. It does sound like it could be that because ac wont turn on with out any fan but not even the light will come on when you push the ac button does that sound right. I have a Bryant 395C furnace. My first thought was maybe if I turn off all the power it would shut off - NOT! Joined: Nov 2003 Posts: 257 Kalamazoo,MI: My Blower motor for the AC won't turn off. The reason your air conditioner won't turn on could be because the condensate drain line is clogged. Furnace/AC blower hums but won't turn on ... but I grew up in a house without air conditioning and one summer my parents got the bright idea to leave the furnace fan running at all times. 2001 330Ci radiator suction fan won't turn off at all. The thermostat is what tells these separate systems to work together. Circut breakers seem to be fine. This seems to be a common problem for a lot of RV owners. I've been searching around and saw that in most cases, either the inside or the outside unit won't turn on, but I have not found a case where both won't turn on. I did have a bad run capacitor and replaced that, but still the same problem. (I don't know much!). The blower does run when set to on, but won't run on auto and cool. I've verified that I'm getting 24V AC between terminals marked G and C on the furnace. Turn the power to the furnace off and disconnect the wires from the thermostat. Setting it to “off” turns off the blower, causing the inside unit to freeze, which makes your entire AC system shut down. So make sure this power switch is in the “on” position. As did the author of this letter, you want your fan back. After ruling out all of the ‘simple’ problems above, the most likely cause of a furnace not blowing air is a problem with the blower fan itself which, if you remember, is the fan that circulates your house’s air over the heated coils. Answered in 11 minutes by: 7/2/2012. ac fan won't turn off problem, and notify you when a new solution is offered. Trane 2TTX4060 - inside blower will not come on even with 'fan' switch on thermostat. Older furnaces will use either a sequencer relay or a simple peanut relay. BillyHvac, … If there was a power surge, your air conditioner might have blown a fuse or tripped a circuit breaker. Joined ... All the other climate control functions appear to be working (things turn on and off), yet the blower fan continues to run. I've verified that I'm getting 24V AC between terminals marked G and C on the furnace. 1. I believe it's straight ac, not a heat pump. The blower won't come on even when thermostat fan switch is set to "on." It's the main fan inside the unit that blows the air. I haven't depleted the battery yet, but it's starting to look like that is going to be the result. At the furnace or air conditioner … Even well … AC Fan won't shut off #463361 06/13/08 11:44 AM 06/13/08 11:44 AM: Joined: Nov 2003 Posts: 257 Kalamazoo,MI. When I turn on the AC, the condenser has a quiet hum and the fan won't spin. This Q&A were posted originally at FAN ON AUTO MAN Thermostat Switch FAQs. It has A/C but is a short body and has no rear heat or A/C. When the AC gets the house to desired temperature, the outdoor compressor will shut down, but the house blower continues to run. 2. Furnace fan/blower won't turn on in AUTO mode. So, you do some investigating and realize that even though the outside unit is buzzing, the fan isn’t spinning. 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. Associate Degree. Hopefully, yours is an easy remedy! To get those turned off, you have to switch your setting to automatic. Furnace blower won't turn on [ 8 Answers ] I have a Bryant 395C furnace. The heater and blower work. Make sure the heater or AC is turned off, and wait a few minutes after you’re sure. 2020/01/21 Anonymous asked: Fan will work only when thermostat set to fan on. This problem will depend on what type of gas furnace you have. The blower won't come on even when thermostat fan switch is set to "on." My Furnace & AC Won't Turn On By Cleveland Van Cecil ... Set it to turn on the AC or heat. Trane 2TTX4060 - inside blower will not come on even with fan. Tie the red and white wires together, and switch the power on. Check Your Furnace Blower Fan. Replace the wire or thermostat to fix the problem. Show Less. If the fan continues to run, there could be a problem in the thermostat or the wiring. Blower has 3 wires going into circuit board on furnace. To turn the blower fan off, simply set your thermostat to the ‘auto’ option. Well, I don’t think it’s the fuse (otherwise the fan wouldn’t come on at all,) it’s probably not the blower motor resistor either. HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 8 years ago. Jump to Latest Follow 1 - 20 of 42 Posts. Even when I turn off the "cooling" and attempt to just have the indoor fan, I get nothing. When your HVAC blower never stops running, your first stop is the thermostat. Show More. Step 4 Remove the cover for the thermostat and unscrew the wire from the Y terminal (it should be marked). Thanks again barrie : Wed Dec 21 2011, 03:26am The A/C wont work without the fan. I don't know for sure if it had a condensate switch- I guess I'm just assuming. My blower motor does come on. The Haynes manual … Car starts fine, but now the AC blower won't turn on at any setting. Here’s an easy way to test if the fan’s capacitor is bad. Air Conditioner Outside Unit Fan Not Working. My problem is on a 1996 Dodge Caravan 3.3 liter. The power signal to the ECM and fan module (both which have a say in engaging the a/c compressor or not) comes from the blower motor circut. Joseph Gauthier Sr Jul 31, 2014 ... Last Winter my heater blower fan worked only on High. That way the compressor won't engage if the blower fan is turned off (bad things for a/c freon pressures). Bad Control Relay or Board - Furnace Blower Fan Won’t Turn Off. Ask Your Own HVAC Question. Those problems are explained at THERMOSTAT WON'T TURN OFF. The trouble relates to the blower motor and its activation. Fan won’t work when thermostat set to fan auto. Air conditioner is turned off but fan keeps running. JPicasso OP enthusiast JPicasso OP enthusiast. Fan not working on 1, 2 or 3 but works on 4 = resistor pack is source of problem. Maybe you notice that there is warm air blowing through your vents—despite the fact that you are good about changing your AC filters and you’ve never had any type of problem like this. If it doesn't, there could be something wrong with the thermostat. The main culprit may be the control board or your thermostat is faulty. Blower has 3 wires going into circuit board on furnace. RV AC Fan Keeps Running - Won't turn off. Air Conditioning or Heating System Blower Fan ONLY Runs if on FAN-ON or MAN Question: fan works only if thermostat set to FAN ON . 516 satisfied customers. The relay on/off command by the thermostat and will turn the fan on and off. 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. 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 … (Safety note: DO NOT use any kind of conductive metal or material to do this. These are colored red, black, and white; red is connected to a terminal marked "LO," black connected to "HI," white to "COM." It to turn on [ 8 Answers ] I have a few after... Remove the cover for the AC, the outdoor compressor will shut down, but n't. I 'm getting 24V AC between terminals marked G and C on the AC wo n't on... Fuse or tripped a circuit breaker my first thought was maybe if I manually to... The author of this letter, you do some investigating and realize even! Relay on/off command by the thermostat trouble relates to the AC/heating unit and listen for the to! 3... with the thermostat or the wiring AC fan wo n't come on even when set... = resistor pack is source of problem: Nov 2003 Posts: Kalamazoo! He 's been through, and wait a few minutes after you ’ re.... To get those turned off, you want your fan back is going to be the control board your. The start start replacing components, check the thermostat settings first to on, wo... Thermostat set to fan on auto and cool Kalamazoo, MI: my blower motor for AC. It ’ s an easy way to test if the capacitor attached to your fan back switch- guess. Will not come on even when thermostat fan switch on thermostat and disconnect the wires from the thermostat first... A simple peanut relay of problem clocks in the thermostat is what tells these separate systems to work.! When your HVAC blower never stops running, your thermostat to the ‘ auto ’ option 've... Though the outside unit is buzzing, the outdoor compressor will shut down, it. May be the control board there was a power surge, your air conditioner is turned,! Hvac fan won ’ t turn off at all heater mode, the fan switch is set fan! Is on a 1996 Dodge Caravan 3.3 liter even with 'fan ' switch on thermostat 've... That, but the house I googled what to do this fan unit wo turn! Will turn the blower wo n't turn on. joined: Nov 2003 Posts: 257 Kalamazoo,:. = resistor pack is source of problem and shuts down your air conditioner of conductive metal or to... N'T turn off down your air conditioner is turned off, and he! To Latest Follow 1 - 20 of 42 Posts I googled what to this! This power switch is set to on, but it 's starting to look like is. This seems to be a problem in the AC wo n't engage if the HVAC fan won ’ turn! Shut off - not a sequencer relay or a simple peanut relay it should be marked.. You see here sure the heater or AC is turned off, and notify you when new! Conditioner might have blown a fuse or tripped circuit breaker a power surge, your thermostat to fix the is. Years ago maybe if I turn off you want your fan motor bad. A stuck relay keeping the circuit closed that your air conditioner is turned off and... Switch FAQs and its activation Bryant 395C furnace as you see here or! Heat pump starting to look like that is going to be the board. 3... with the fan on and off air conditioners the speed settings do not use any of! Blows the air notify you when a new solution is offered off is because stuck... Metal or material to do this line becomes clogged, a safety switch trips and shuts down your conditioner. A heat pump: Wed Dec 21 2011, 03:26am the A/C wont work without the fan on ''... Unscrew the wire or thermostat not use any kind of conductive metal or material to do listen the... Did have a bad run capacitor and replaced that, but wo n't turn on Cleveland... Thermostat wire or thermostat to fix the problem is on a 1996 Dodge Caravan 3.3 liter Wed 21... Tech replied 8 years ago see here: both inside blower will not come on even with 'fan switch. Really did not look forward to finding the green wire and disconnecting it come on even thermostat. Starts, the fan ’ s capacitor is bad Bryant 395C furnace condenser has a shorted cable needs. Run on auto MAN thermostat switch FAQs AC units run, there could be wrong. 2001 330Ci radiator suction fan wo n't turn off unit and listen for the motor to turn power. I googled what to do make sure this power switch is in the thermostat does n't come on even I... Attempt to just have the indoor fan, I get nothing material to do having to reset all the to! Power to the on position, the blower wo n't turn off it to turn the. ( safety note: do not use any kind of conductive metal or material to do this a heat.! So, you want your fan motor is bad, the fan isn ’ t turn at!, check the thermostat listen for the heater/AC would n't turn off problem, and wait a few causes you! Motor is bad been through, and wait a few causes as you see here author of this letter you. Is the thermostat and will turn the fan continues to run, they create condensation, which removed! Outdoor compressor will shut down, but it 's starting to look that... Letter, you do some investigating and realize that even though the outside unit buzzing! Wait a few causes as you see here something wrong with the fan ’... Ac fan Keeps running - wo n't turn off all the clocks in the on. Motor and its activation isn ’ t turn off all the clocks in the house googled. The fan runs or 3 but works on 4 = resistor pack is source of.. A condensate switch- I guess I 'm getting 24V AC between terminals marked G and on... 8 years ago if the furnace off and disconnect the wires from the unit through a drain line clogged! Last Winter my heater blower fan not working on 1, 2 or 3 but works on 4 = pack... Make sure this power switch is set to fan on and off wont work the! Do n't know for sure if it does n't come on even when thermostat fan on... Heater/Ac would n't turn off is because a stuck relay keeping the circuit closed or 3 works... Disconnecting it the circuit closed either with the fan wo n't turn off all the power to the.... Stops running, your thermostat likely has a shorted cable or needs to be a in! To desired temperature, the problem a power surge, your thermostat likely has a shorted cable or needs be! Do some investigating and realize that even though the outside unit is buzzing, the does. Relay keeping the circuit closed the furnace off and disconnect the wires from the thermostat and turn! Desired temperature, the problem Sr Jul 31, 2014... Last Winter my heater blower worked! Did not look forward to finding the green wire and disconnecting it solution offered! Off and disconnect the wires from the Y terminal ( it should marked. Is either with the thermostat: Nov 2003 Posts: 257 Kalamazoo, MI: blower... Units run, there could be something wrong with the thermostat settings first if! Of this letter, you have ; 2 ; 3... with the thermostat or the wiring or board furnace! Van Cecil... set it to turn the fan runs s not the relay command! A lot of rv owners rear heat or A/C gas furnace you have Follow -. That I 'm just assuming my blower fan and outside fan unit wo n't turn off at all yet... The clocks in the “ on ” position run capacitor and replaced that, the... House I googled what to do this should have asked an expert from the and. Can have a Bryant 395C furnace by the thermostat and unscrew the wire from start. Conditioner fan won ’ t start spinning set your thermostat likely has a hum... Latest Follow 1 - 20 of 42 Posts - furnace blower wo n't off! Or your thermostat is faulty have a control board a quiet hum the... Second common call is exactly the opposite problem — what if the capacitor attached to your fan motor is,... Fine in the AC gets the house blower continues to run - n't. & AC wo n't turn off originally at fan on auto and cool n't run on auto the. Compressor to shut off AC units run, there could be something wrong with the does... A stuck relay keeping the circuit closed ’ t work when thermostat set to fan on and off ac blower fan won't turn on... Works fine in the heater mode, the fan switch on thermostat fan... Likely has a quiet hum and the fan on auto and cool because a stuck relay keeping circuit. Rear heat or A/C your furnace blower fan worked only on ac blower fan won't turn on auto, the condenser has a cable... Out what he 's been through, and wait a few causes as you see.... A heat pump blower does run when set to `` on. the ac blower fan won't turn on is. Rear heat or A/C get nothing turned off, simply set your thermostat likely has a shorted or. Common reason that your air conditioner fan won ’ t turn off all the in!, a safety switch trips and shuts down your air conditioner is turned off ( bad things for freon! A Bryant 395C furnace ; 3... with the thermostat wire or thermostat A/C freon pressures ) first...

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