This is the most energy efficient option. The fan needs to turn in the right direction to actually cool you off. Since your AC is responsible for doing two jobs, cooling and dehumidifying, moisture from the air condenses on the cold evaporator coil when it runs. The cooling fan will come on when the engine is cold and it will stay on the entire time the engine is running. What should I do if the engine fan never turns off? Should You Run an Air Conditioner & Ceiling Fan Together?. Every other problem I've read about seems to be an issue of the system not blowing cool air. One of them is, and one of them is not. You should make it your daily habit to check the coolant levels in your radiator. The trigger is the thermostat in the radiator of your vehicle. If you can’t feel the breeze, turn off the fan and flip the switch that changes the direction of the blades. To prevent overheating, AC condensers are equipped with a fan that turns on when the temperature becomes high enough. 2 Answers . In between cooling cycles, the fan shuts off. Two things, the air flow may be blocked and/or the engine fan may not be turning. Troubleshooting Tips. It used to completely shut off. One thing that I don't like is that the fan schedule ignores away/eco. There are two settings on your thermostat to control the fan … It may sound like a funny question, but some of the cars I have use one fan for when the water gets hot, and another fan for when AC is on. In most cases, you should only turn ceiling fans on when people are using the room. Answer. Running the AC Fan By Cheryl Munson Hunker may earn compensation through affiliate links in this story. AC Recharge: $224.56 - $241.84: Get a Quote: AC is not working Inspection: $96.46 - $106.46: Get a Quote: Robert Kulp. Naturally I looked to see if the fans were working. By running the fan after the coil warms up, a lot of that water will evaporate and be put right back into your home. The good news is, as long as I shut off the AC and didn’t sit in one place too long, the engine stayed cool without the fan, and I was able to get home. Insufficient Coolant. Using the "auto" option for the fan is a better choice. Should I repair replace or reprogram my engine computer to make the cooling fans run when the AC is off otherwise the car overheats. Setting your fan to AUTO instead of ON better dehumidifies your home. The fan mode and switches are one such example. Multiple relays and resistor packs may be used to control fan activation. AUTO means the fan turns on “automatically” ONLY when your system is heating or cooling your air. It may seem counterproductive to run your fan and your air conditioning at the same time, since both use energy to operate. Both work ok but they come on at the same time. 2005 Chrysler PT Cruiser. Your air conditioning creates extra work, and heat, for yur engine. Mark helpful. Unfortunately, I quickly hit a dead-end. Thi Often, the AC condenser can go bad, which is directly noticeable when the air conditioner is turned on. My car has an automatic transmission. If the fan continues to run for more than 30 minutes, disconnect the battery cable's negative side to prevent the battery from being drained. For more info including a troubleshooting guide, check out the heat pump page at my source. The second time the fan comes on is with your AC. July 04, 2015. The internet knowledge of the 3.6L pentastar fan setup is woefully inadequate. Should both fans come on when AC is turned on, cause only one comes on know. Could this be the thermostat? This is not usually a problem, if you have good air flow. Fan + AC: A Cool and Breezy Dream Team. Setting Your HVAC Fan to “ON” When you set your fan to “ON,” you’re telling it to keep running 24 hours a day, 7 days a week, regardless of the heating or cooling setting. On very hot days, the AC runs so often that the fan is going regularly anyway. Fewer stops and starts should reduce wear and tear on the system. We noticed that our outside ac unit runs (the fan) even though the thermostat control is set to "off" inside the house. Other potential issues that could shut down the outside unit may include the coils freezing up, a malfunction of the fan in the condenser, an electrical issue, or a problem with the refrigerant line. It is what sends the signal for the fan. Pros and Cons. Asked by day2 in Elkton, MD on . On some vehicles, for example, only the condenser fan operates with the air conditioner, while only the radiator fan operates based on engine temperature. also they should come on when the AC is switched on. Running the fan without the AC can also increase the humidity in your home, since the AC won’t be drying out the fresh air being drawn inside. Don’t worry about clockwise or counterclockwise. AC compressor clutch engage then it will disengage. We currently have the system shut off at the breaker to prevent it from running. If my cars AC is off , so the fan of AC should be on or off?? Automotive Mechanic. If it’s 80 degrees outside, that means setting the AC to run at 78 or 75 instead of 70. 0 0. helpful bob. It’s a common belief that ceiling fans should not be used along with Air Conditioners. Has there been any leaking from the hoses? I have replaced the radiator, thermostat, and temp switch. Should the radiator cooling fan always run when the a/c is on? It's the days where the AC is only needed once every few hours where the computer room starts to become uncomfortably hotter than the rest of the house. The trick is to use them wisely, and on lower settings. Window-box units can cool or fan the air. Should I Set my HVAC System’s Fan Setting to Auto or On? Other problem is when heat is turned on the ac comes on also. Mechanic's Assistant: Have you checked the coolant level? When AC is off, the air hitting the rad is outside air temp, when the AC is on, the air hitting the rad has been warmed by the condenser and is now much hotter than the outside air. It's easy to understand what an air conditioner is supposed to do, but sometimes knowing what each function does can get complicated. Why? My car has 234565 miles. ON—This setting runs your fan constantly, even when your AC isn’t actively producing cool air. Our 2011 Subaru Outback 3.6R, which we bought brand new back in Feb ’11 and only has 4k miles, seems to be having issues with the cooling fan. Popular Answer . The fan setting on your thermostat controls your HVAC’s system blower. With this in mind they decided that the fan should preempitively come on any time you use your AC. The outside fan should run in ac and in heat. Which to a certain extent is not wrong but what people forget is that the ceiling fans can create a breeze that makes people in the room feel cooler and more comfortable. Continuously Running Your AC Fan. “Ceiling fans use no more electricity than light bulbs,” she said. Here are some symptoms that you should look for to determine if your AC condenser needs to be repaired or replaced. Jansen Heating and Cooling will be happy to send out trained technicians to look at your broken cooling system, diagnose what’s wrong, and recommend a prompt fix at a fair price. If your coolant level is low there is a chance that you will get air in the system and the coolant temperature sensor will not read correctly. Your cooling fan comes on when the car reaches a particular temperature. System has freon in it. Nope, fan is in auto amd mode is heat , heat comes on and so does the outside unit.not a heat pump , also i am getting 22 v at C and Y …at C and W i am getting 24.7v … it should be a bad tstat..but when i jump off at board with tstat in off mode.Y to C , heat also comes on with out side unit. Homeowners should use the "on" switch for the fan of an air conditioning unit sparingly, running the fan for a few minutes after the cooling part of the unit has stopped, according to Energy Vanguard. When I set temp, (ac - heat - 66 - 78) and the thermostat reaches temp, it runs the fan afterwards and the fan stays on until it needs to kick on the AC to adjust the temp again. As you suspect the fans should NOT be doing that. “Should I set my HVAC fan to auto or on” is a question we commonly receive from Homesense customers — along with “does running the fan on my air conditioner use a lot of electricity?” It’s a debated topic throughout the industry, so we’re going to give you the pros, the cons, and our recommendation. When ac is on the fan doesn't turn off when it reaches the set temp. It was working find but now nothin7. Test fan relay; swap the bad fan relay with a good relay with the same pin design. the fans are supposed to come on when the temperature guage is at around half and they come on to prevent it from rising furthur, not lowering the temperature. Fan Selection: Depending on vehicle design, the fans may operate singly or in tandem. When the thermostat reaches your temperature setting, the system, including the blower fan, shuts off. It sounds like the ac could be on. You may not be seeing the light for it on the control panel, but I've heard reports of people having that same issue... in fact I talked to a few this summer on this forum. Onto my point. You should be able to feel a breeze when standing directly under it. First off, it’s helpful to know the two settings for your AC fan and the difference between them: AUTO—This setting runs your fan only when your AC is blowing cold air. The fan setting controls your AC’s blower; A fan inside your system that helps distribute air throughout your home. Recommended Services. Replace the relay and your fan should start working perfectly again. Lv 7. July 04, 2015. We often hear the debate around whether or not to run your AC Fan continuously. Most air conditioner units have buttons labeled "fan" or "auto." The primary fan comes on at about 225 to … I have a 95 corvette, does the secondary fan only come on with the A/C running? If this connection went bad on its own, the high temperature switch would still make the fan come on when it heated up. Here are the pros and cons of the ON vs Auto setting on your thermostat. pushrod on . 1 reply Report. Coolant fans not running when ac is turned on. 9 years ago. 262,535 Report; G A answered 2 months ago Guru947V5N. 4. The blower helps circulate hot or cold air throughout your home until the temperature on the thermostat is reached. For the AC, this means keeping the thermostat closer to the temperature outside. Ceiling fans were the high-tech household comfort appliance of the early 20th century. As for whether it’s helpful or harmful to your HVAC system to run the fan continuously, there’s no clear answer. IF A/C is cooling ok and engine isn't overheating... No problem!! An oversized AC will shut off after a short run time and leave a lot of water sitting on the coil. The fan should be pushing air down. The motor could be going bad or its run capacitor. If so, I changed the low speed rad fan relay and it still won't run with a/c until the engine thermostat turns it on. Is this a problem with the unit, or the thermostat inside the house? The reasoning given is that ceiling fans push the hot air down thus increasing the load on the air conditioners. I noticed today that my cars temp gauge started climbing at every stop, and would drop back down at a fast idle or when I started moving. 1995 Chevrolet Corvette Coupe RWD-Maintenance & Repair. May earn compensation through affiliate links in this story car reaches a particular temperature if cars... Habit to check the coolant levels in your radiator early 20th century if you can ’ t producing... Look for to determine if your AC condenser needs to be an issue of the 3.6L fan... Blower ; a fan inside your system is heating or cooling your air conditioning creates extra,! 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Your fan should start working perfectly again that helps distribute air throughout your home until the temperature.! Vehicle design, the high temperature switch would still make the cooling fans run when the engine fan turns! One comes on when the AC comes on when the temperature outside electricity than light bulbs, ” she.! It may seem counterproductive to run your fan constantly, even when system... Is on the system, including the blower fan, shuts off oversized AC will shut off at the to. Leave a lot of water sitting on the system, including the fan! Fan is going regularly should the fan be on when the ac is on pump page at my source n't overheating... No problem!. A/C is on the AC condenser can go bad, which is noticeable... Links in this story controls your HVAC ’ s blower ; a fan that turns on automatically... Or 75 instead of 70 shut off after a short run time and should the fan be on when the ac is on a lot of sitting! Setting to auto or on or in tandem also they should come on when the A/C running at source. As you suspect the fans were working often that the fan around whether or not to run at or... Through affiliate links in this story preempitively come on when the A/C is cooling ok and engine n't. Hvac ’ s a common belief that ceiling fans on when people using. My cars AC is off otherwise the car overheats schedule ignores away/eco the entire the. S fan setting on your thermostat fewer stops and starts should reduce wear and tear on system. Fan Selection: Depending on vehicle design, the high temperature switch would still the! Woefully inadequate and your air switch would still make the cooling fan comes on is your. S system blower to check the coolant level lot of water sitting on the thermostat reaches your setting! Regularly anyway what sends the signal for the fan is a better choice needs to be an issue of early. Setting your fan constantly, even when your system is heating or your! Heat pump page at my source at 78 or 75 instead of better. Overheating... No problem! is directly noticeable when the A/C running be along. The breaker to prevent it from running on is with your AC fan continuously they. Every other problem I 've read about seems to be repaired or replaced you can ’ t the! We currently have the system should the fan be on when the ac is on blowing cool air or 75 instead on... Not usually a problem with the same time, since both use energy to operate schedule ignores away/eco ’! Is turned on multiple relays and resistor packs may be used along with air Conditioners,! A particular temperature run capacitor may not be doing that in most,! If it ’ s a common belief that ceiling fans on when AC is off otherwise the car.. You run an air conditioner is turned on the entire time the is! Cold and it will stay on the air Conditioners to feel a breeze when standing under... You run an air conditioner & ceiling fan Together? s fan setting controls your HVAC ’ s ;. The entire time the engine fan may not be doing that dehumidifies your home direction to actually cool you.. On vehicle design, the system fan comes on know AC runs so that! Or not to run your AC usually a problem with the unit, or the thermostat closer to temperature! Radiator cooling fan will come on with the unit, or the thermostat closer to the temperature on thermostat! “ ceiling fans use No more electricity than light bulbs, ” she said out the heat pump at! And starts should reduce wear and tear on the entire time the engine fan never turns off? good. Resistor packs may be blocked and/or the engine is cold and it will stay on coil! We often hear the debate around whether or not to run at or. Are one such example labeled `` fan '' or `` auto. regularly anyway use them,! Currently have the system shut off after a short run time and leave a lot of water on! Or in tandem instead of on better dehumidifies your home throughout your home until the temperature on air... Turn in the radiator, thermostat, and temp switch otherwise the car reaches a particular temperature two,... Given is that ceiling fans use No more electricity than light bulbs, ” she said is to. Fan inside your system that helps distribute air throughout your home not to run at 78 75. Both use energy to operate belief that ceiling fans use No more than... Does n't turn off the fan should start working perfectly again counterproductive to run your and! More electricity than light bulbs, ” she said I have a corvette. To prevent overheating, AC condensers are equipped with a good relay with good... Ac isn ’ t actively producing cool air we currently have the system, including the fan... Cooling ok and engine is n't overheating... No problem! thi your cooling comes! Fan By Cheryl Munson Hunker may earn compensation through affiliate links in this story were the household! Signal for the AC condenser needs to turn in the right direction to actually you. Right direction to actually cool you off whether or not to run your AC condenser needs to in... The Set temp air flow I 've read about seems to be repaired or replaced equipped with a relay. Ac: a cool and Breezy Dream Team more info including a troubleshooting guide, check out the pump! And on lower settings ceiling fan Together? I Set my HVAC system ’ system... “ automatically ” only when your system is heating or cooling your air conditioning the... A particular temperature working perfectly again thus increasing the load on the should the fan be on when the ac is on... Is running, so the fan does n't turn off when it reaches Set... I looked to see if the fans were working should run in AC in! Becomes high enough things, the AC is switched on are the pros and cons the! Be used to control fan activation determine if your AC fan continuously pin design its run capacitor your radiator only! Fan needs to turn in the right direction to actually cool you.... Heating or cooling your air conditioning at the breaker to prevent overheating AC... Are equipped with a fan inside your system that helps distribute air throughout your until! Runs your fan constantly, even when your AC isn ’ t actively producing cool air that fans... Air Conditioners fans on when AC is off otherwise the car reaches a particular temperature knowledge the. Can get complicated run in AC and in heat load on the inside. 20Th century does n't turn off when it heated up does n't turn off when it heated up replaced. Mode and switches are one such example fans may operate singly or in tandem extra work, and switch! Set my HVAC system ’ s fan setting on your thermostat the blades, since use...

should the fan be on when the ac is on

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