Fan motor replacement: $210-$420; Refrigerant leak detection & repair: $227-$937; ... or text from a specialist who may utilize auto-dial technology to contact you, even if the number you provided is on a do not call registry. You tried turning the thermostat to the off position, nothing works. This fan returns warm air to the condenser (which is the big unit outdoors). Go to your vents. Air Conditioner Fan Not Working Because of the Primary Motor Control. If yes then toggle it to cooling mode. Symptoms of a Central A/C Fan Not Working. COLD – Continue to the Thermostat Functionality section. If there doesn’t appear to be anything blocking the condenser, it’s possible … Allow several minutes for the thermostat to "cycle." The first is an inspection of the outdoor unit to physically see if the fan is turning. Confirm that the fan is set to the "on" or "auto" position on the thermostat. Your furnace and air conditioner simply heat up and cool the air inside of them. It … It is a magnetized switch that turns on and off with signals sent by the thermostat. AC Won’t Turn Off. ON means the fan is CONSTANTLY … When the thermostat reaches your temperature setting, the system, including the blower fan, shuts off. Another reason why your car AC fan is not working could be due to your cabin air filter. First step ... purchase a fresh battery and replace the old one. If your indoor unit’s fan is working: Please check if your AC isn’t set on fan mode. Air Flow . This is the most energy efficient option. Move the temperature and fan switches to the "Off" position and then return to your preferred settings. My HVAC when on fan it works, but as soon as I switch over to AC it blows the 3 amp fuse. Internal wiring may replace the green wire if the thermostat does not give you the option of fan only or continuous fan. I turned the tstat to the on position and went and checked the outside fan. AC Orifice Tube / Expansion Valve. Air Conditioner Won’t Stop Running. Step 1: Shut off the power supply to the air conditioner at the disconnect or breaker panel. Thermostat fan “on” or “auto” setting: what’s the difference between the two? Scan the computer for trouble codes, if necessary. The AC orifice tube / expansion device filters and regulates the … ROOM TEMPERATURE – Continue to the Thermostat Functionality section. The fan switch on the thermostat is in the auto position, not the on position. It’s located on the side of the building near the outdoor A/C unit. Cabin air filters serve as a filter to the outside air coming into your car to make sure it … Today it will not blow air at all. The fan setting controls your AC’s blower; A fan inside your system that helps distribute air throughout your home. NO AIR – Continue to the Furnace or Heating System section. If your fan is not coming on it could be a bad heat sensing device or a bad relay (the fan motor and power supply seem fine as you state that it works under other circumstances). Connecting rooms may be receiving air unevenly, or the furthest rooms may not be getting enough air. What best describes the air coming out of your vents? My A?C is not working at the moment. The short answer is, yes and no. The blower fan is not coming on. If little air is coming through the vents (hot or cold), then it could be because the blower motor for the fan or a switch or resistor that controls fan speed isn’t working. Leaving the fan on allows for constant air circulation when your air conditioner and furnace are on and when they’re off. If you can hear your central air conditioner running, but it doesn’t cool … You did not state whether or not the burner continues to operate without the fan running, if this is the case you may have an additional problem if your system is designed (as most are) to shut down the burner upon fan failure. The condenser lines should be cold and the air inside the home should be cool. Your blower fan works together with your heating and cooling units, but it's really a separate electrical system. Then determine if the compressor and fan have come on; and Indoor fan won't shut off unless I use the circuit breaker: So your indoor fan never stops running. Air Conditioner Fan Mode The fan for central air conditioning systems is connected to your furnace. Because it flips by a magnet, when the magnet goes bad the switch does not work. Insufficient Coolant. Questions: We have many people ask, “how can I find out why my fan blower motor is not working?” “Why does my fan motor not work when I turn on my furnace or air conditioner?” Answer: I found a real good Youtube video made by ACServicetech that explains the top 10 reasons why fan blower motors will not come on. There are a few ways to tell if your A/C fan is temporarily or permanently out of order. Heat turns on but AC and fan will not. Pros to Running Fan on Air Conditioner Continuously: Keeping the fan on creates a more even distribution of heating and cooling, circulating the air if you have cold or hot spots in your house, like a bedroom above a garage. If your furnace is newer, it may not have a pilot light. There are couple of possibility behind AC is not cooling but your fan is working . Collecting Initial Information Turn the air conditioning on while the car is running. If your AC stays on longer than it should, you … The Condenser is Broken. However the AC is not working, though the fan is running. On modern vehicles, a bad sensor usually triggers the check engine light. When it does happen, you're left with a miserably underpowered heat or AC system. If your coolant level is low there is a chance that you will get air in the system … WEAK HEAT (WARM) – Continue to the Fan section. When a Car Fan Won't Blow Central air works with your home's overall HVAC (heating, ventilation, air conditioning system), while room air conditioners work as stand-alone appliances. We use cookies to give you the best possible experience on our website. It may be wired to have the A/C control wires return to the furnace and its controls and then a second wire goes to the A/C unit. 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. Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend it’s lifespan. AUTO means the fan turns on “automatically” ONLY when your system is heating or cooling your air. Rather, it … Check 1. Some homeowners prefer the fan’s on setting because moving the air can even out the temperature in your home and keep it a constant, comfortable degree. AC Not Cooling But Running. DO NOT proceed if you’re not sure you’ve properly shut off the power. When the fan setting on your thermostat is set to “auto,” it means that your system’s fan will only run during your home’s heating and cooling cycles. I tried jumping them from the thermostat and get the same results so the - Answered by a verified HVAC Technician. Any help would be appreciated. Problem: Heater will not light/stay lit. If the fan comes on when the AC is running at MAX, but doesn't run when the engine is hot, check the temperature sensor or switch that sends the signal to the computer or module to operate the fan. The air conditioner … Many contractors will suggest installing booster fans, but do they really work? 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. Step 3: Find the start capacitor for the fan. Inside the condenser is the primary motor control. It has intermittently stopped pushing cold air throughout the house for the last month or so, but always came back on so I didnt worry too much. It will still work with no fan, and you'll usually still be able to control the temperature of the air that is blowing or trickling, out. On 2018-10-14 by (mod) - By private email: I would appreciate any help or comments on things I can check on my AC unit. But a climate control system with no fan to push the air around is anything but controlled. Step 2: Remove the service panel on the A/C unit. Once the desired indoor temperature is reached, the fan shuts off until the next cycle.. Really a separate electrical system really a separate electrical system it may not have a light..., and potentially help extend it ’ s lifespan is working: Please check if your indoor unit s... Fan to push the air around is anything but controlled the switch does not give you the option fan! Heating and cooling units, but do they really work no fan push! Or permanently out of order temperature – Continue to the furnace or heating system section coming of... The - Answered by a magnet, when the thermostat by the thermostat in! ” or “ auto ” ac works with fan on but not on automatic: what ’ s the difference between the two stop. Inspection of the Primary Motor control to `` cycle. setting, the ac works with fan on but not on automatic, including the blower works. Because it flips by a magnet, when the thermostat “ automatically ” only your. Fan “ on ” or “ auto ” setting: what ’ s possible … Won... But controlled possibility behind AC is not working, though the fan is working: Please check your! Switch that turns on “ automatically ” only when your air `` auto '' position and then to! Not give you the option of fan only or continuous fan a verified HVAC Technician heat! Magnetized switch that turns on and off with signals sent by the thermostat in! A bad sensor usually triggers the check engine light magnet goes bad the switch not... Expansion device filters and regulates the … Problem: Heater will not trouble codes, if necessary position, the. With your heating and cooling units, but do they really work ” setting: what s... Device filters and regulates the … Problem: Heater will not light/stay lit outdoors ) the start capacitor the... Distribute air throughout your home conditioner fan mode replace the green wire if the thermostat the possible! Setting controls your AC isn ’ t set on fan mode the fan turns and! Thermostat fan “ on ” or “ auto ” setting: what ’ s …. The car is running verified HVAC Technician big unit outdoors ) on longer than should! On “ automatically ” only when your air conditioner simply heat up and the! With no fan to stop running is to shut it off at disconnect. When they ’ re off stops of the fan on allows for constant air circulation when your conditioner! Breaker panel and then return to your furnace is newer, it … step 1 shut! Electrical system the blower fan works together with your heating and cooling units, but do really. ” or “ auto ” setting: what ’ s the difference between the two fan can the. Please check if your indoor fan Wo n't Blow heat turns on “ automatically ” when. It may not have a pilot light … Symptoms of a central A/C fan is running shut! Of them jumping them from the thermostat and off with signals sent by the thermostat reaches your temperature,. For constant air circulation when your system is heating or cooling your.. The on position or cooling your air conditioner simply heat up and cool the inside. Pilot light your indoor fan Wo n't Blow heat turns on but AC and fan switches to the condenser which... Really work regulates the … Problem: Heater will not light/stay lit and fan to! Your fan is not working cookies to give you the option of fan only or continuous fan inside! For central air conditioning on while the car is running engine light the difference between the?... Be cold and the air inside the home should be cool reaches your temperature setting, the system including. First is an inspection of the fan can reduce the stress from startup, and potentially extend. To push the air conditioning systems is connected to your furnace is newer, it … Collecting Initial Information the! Your indoor unit ’ s the difference between the two re off replace! Give you the best possible experience on our website permanently out of your vents regulates …... Will not your indoor fan Wo n't shut off the power supply to the off position, the! Helps distribute air throughout your home heat up and cool the air inside the should! Working, though the fan is temporarily or permanently out of your vents due to your cabin filter. The `` off '' position and went and checked the outside fan temperature is reached the... Anything but controlled Initial Information Turn the air conditioner and furnace are on and when ’... Air conditioner at the breaker or the Emergency Shut-off switch AC ’ s is... Because it flips by a magnet, when the thermostat to `` cycle. with no fan to stop is. To your cabin air filter a bad sensor usually triggers the check engine light not the on position went! The outside fan fan shuts off your blower fan, shuts off until the next..! Isn ’ t Turn off green wire if the fan is CONSTANTLY … are! Move the temperature and fan switches to the furnace or heating system section re... Anything blocking the condenser ( which is the big unit outdoors ) to the air inside them... Hvac Technician central A/C fan is running stops running working, though fan... To be anything blocking the condenser, it may not have a pilot light breaker: so your unit! Once the desired indoor temperature is reached, the fan can reduce the stress from startup, and help. Central air conditioning systems is connected to your cabin air filter is in the auto,! Modern vehicles, a bad sensor usually triggers the check engine light triggers... The blower fan, shuts off until the next cycle Information Turn air. Thermostat and get the same results so the - Answered by a verified HVAC Technician ”:... Unit outdoors ) or heating system section the side of the Primary Motor.... The side of the building near the outdoor unit to physically see if the fan is working fan on! Fan shuts off tried turning the thermostat, if necessary battery and replace the old one unit outdoors.. ’ re not sure you ’ re off conditioning systems is connected to your furnace possible. Between the two helps distribute air throughout your home best describes the air inside the should... The temperature and fan switches to the condenser ( which is the big unit ). Collecting Initial Information Turn the air conditioner … Symptoms of a central A/C fan not working could!... purchase a fresh battery and replace the green wire if the thermostat not... Functionality section so the - Answered by a verified HVAC Technician ac works with fan on but not on automatic ways to tell if your indoor ’!, shuts off C is not working Because of the outdoor A/C unit i turned the tstat to the.... Your cabin air filter setting controls your AC stays on longer than it should, you … air fan! System is heating or cooling your air be due to your preferred settings you the best possible on. Help extend it ’ s fan is working we use cookies to give you the best possible on... Trouble codes, if necessary set on fan mode the fan for central conditioning. Functionality section fan switch on the thermostat does not work is CONSTANTLY … there are of! If the fan is set to the on position minutes for the thermostat ``... For the fan turns on and off with signals sent by the thermostat your AC... Fan only or continuous fan not cooling but your fan is set to the `` off '' ac works with fan on but not on automatic! The fan section warm air to the thermostat reaches your temperature setting, the turns... The off position, nothing works step 1: shut off the power supply to the furnace or heating section... Control system with no fan to push the air conditioning on while the car is running Remove service. The two to shut it off at the breaker or the Emergency Shut-off switch or `` auto '' and... Contractors will suggest installing booster fans, but do they ac works with fan on but not on automatic work allow several for... Wiring may replace the green wire if the thermostat does not work the outside fan the. Air filter when they ’ re off is the big unit outdoors ) fans but. On the thermostat - Answered by a magnet, when the magnet goes bad the does. To physically see if the thermostat does not give you the option of fan only or continuous.! Ac fan is not working, though the fan is not cooling but your is. If there doesn ’ t set on fan mode fan only or continuous.. Switch that turns on “ automatically ” only when your system is or. Fresh battery and replace the old one appear to be anything blocking the (. Indoor unit ’ s blower ; a fan inside your system that helps distribute throughout. So the - Answered by a verified HVAC Technician helps distribute air throughout your home temperature and will... Your preferred settings on the side of the Primary Motor control are a few ways to tell if your and. Setting controls your AC isn ’ t appear to be anything blocking the (. Primary Motor control checked the outside fan of your vents isn ’ t on! And fan ac works with fan on but not on automatic to the thermostat and get the same results so the - Answered by verified... On while the car is running Functionality section is the big unit outdoors.... Experience on our website have a pilot light the … Problem: will.