On very hot days, the AC runs so often that the fan is going regularly anyway. One of them is, and one of them is not. My car has 234565 miles. 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. We noticed that our outside ac unit runs (the fan) even though the thermostat control is set to "off" inside the house. Your air conditioning creates extra work, and heat, for yur engine. My car has an automatic transmission. When ac is on the fan doesn't turn off when it reaches the set temp. Multiple relays and resistor packs may be used to control fan activation. Fewer stops and starts should reduce wear and tear on the system. 1995 Chevrolet Corvette Coupe RWD-Maintenance & Repair. Is this a problem with the unit, or the thermostat inside the house? 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. Your cooling fan comes on when the car reaches a particular temperature. Mark helpful. 2 Answers . The fan should be pushing air down. Two things, the air flow may be blocked and/or the engine fan may not be turning. Asked by day2 in Elkton, MD on . System has freon in it. The fan setting controls your AC’s blower; A fan inside your system that helps distribute air throughout your home. Lv 7. The fan setting on your thermostat controls your HVAC’s system blower. It is what sends the signal for the fan. Other problem is when heat is turned on the ac comes on also. 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. In between cooling cycles, the fan shuts off. As you suspect the fans should NOT be doing that. Should both fans come on when AC is turned on, cause only one comes on know. 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. This is the most energy efficient option. Coolant fans not running when ac is turned on. For more info including a troubleshooting guide, check out the heat pump page at my source. The outside fan should run in ac and in heat. Pros and Cons. 0 0. helpful bob. For the AC, this means keeping the thermostat closer to the temperature outside. Automotive Mechanic. AUTO means the fan turns on “automatically” ONLY when your system is heating or cooling your air. If you can’t feel the breeze, turn off the fan and flip the switch that changes the direction of the blades. You should make it your daily habit to check the coolant levels in your radiator. 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. July 04, 2015. What should I do if the engine fan never turns off? 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. Using the "auto" option for the fan is a better choice. Here are the pros and cons of the ON vs Auto setting on your thermostat. “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. Should the radiator cooling fan always run when the a/c is on? Replace the relay and your fan should start working perfectly again. The second time the fan comes on is with your AC. We currently have the system shut off at the breaker to prevent it from running. I have replaced the radiator, thermostat, and temp switch. July 04, 2015. 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. In most cases, you should only turn ceiling fans on when people are using the room. Continuously Running Your AC Fan. Could this be the thermostat? 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. To prevent overheating, AC condensers are equipped with a fan that turns on when the temperature becomes high enough. 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. pushrod on . ON—This setting runs your fan constantly, even when your AC isn’t actively producing cool air. The primary fan comes on at about 225 to … It used to completely shut off. Test fan relay; swap the bad fan relay with a good relay with the same pin design. 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. 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. The trick is to use them wisely, and on lower settings. Thi We often hear the debate around whether or not to run your AC Fan continuously. The fan mode and switches are one such example. Every other problem I've read about seems to be an issue of the system not blowing cool air. 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. Window-box units can cool or fan the air. I have a 95 corvette, does the secondary fan only come on with the A/C running? 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. Mechanic's Assistant: Have you checked the coolant level? Here are some symptoms that you should look for to determine if your AC condenser needs to be repaired or replaced. 262,535 Report; G A answered 2 months ago Guru947V5N. It was working find but now nothin7. It’s a common belief that ceiling fans should not be used along with Air Conditioners. Answer. If it’s 80 degrees outside, that means setting the AC to run at 78 or 75 instead of 70. The cooling fan will come on when the engine is cold and it will stay on the entire time the engine is running. It may seem counterproductive to run your fan and your air conditioning at the same time, since both use energy to operate. The fan needs to turn in the right direction to actually cool you off. Should I repair replace or reprogram my engine computer to make the cooling fans run when the AC is off otherwise the car overheats. Fan Selection: Depending on vehicle design, the fans may operate singly or in tandem. 9 years ago. Most air conditioner units have buttons labeled "fan" or "auto." When the thermostat reaches your temperature setting, the system, including the blower fan, shuts off. There are two settings on your thermostat to control the fan … Naturally I looked to see if the fans were working. Onto my point. It sounds like the ac could be on. Recommended Services. Unfortunately, I quickly hit a dead-end. “Ceiling fans use no more electricity than light bulbs,” she said. Setting your fan to AUTO instead of ON better dehumidifies your home. You should be able to feel a breeze when standing directly under it. On some vehicles, for example, only the condenser fan operates with the air conditioner, while only the radiator fan operates based on engine temperature. The motor could be going bad or its run capacitor. 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.
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