Why does the cooling fan only turn on when engaging AC?
Check the fan relay, if it is good then replace the coolant temperature sensor, the AC circuit is separate but it does verify that the fan works.
1996 dodge grand caravan The cooling fan nor the ac fan turns on they spin freely but no action How can you troubleshoot this?
Perhaps there is no problem at all with your car's cooling system! The fan(s) you observe are controlled electrically by a second engine thermostat which will turn the fan on only to support cooloing when there is little forward motion of the vehicle. The fan(s)are designed to turn freely in the rushing wind and will only turn on when your car slows and needs "wind" to continue the cooling.
1997 Saturn cooling fan comes on only when you turn AC on any ideas why this is happening and how to fix it?
The radiator cooling fan is not working on a 1998 Chevrolet Malibu Why does it only turn on when AC is turned on?
You need to check the cooling fan relay and the cooling fan switch. it only turns on when needed. other then when you turn the ac on then its always on. The reason the fan runs with the air conditioning is "on" is to keep the high side pressure down. Otherwise it would increase to the point of something blowing out such as a hose or the pop off valve in the compressor. If the…
Your 99 alero overheats and the cooling fan don't turn on only when the ac is on what could be the problem?
1995 ford escort lx Cooling fan only kicks on when you turn on the heater and set it to defrost the windshield?
Where does the power wire from the fan motor on a 1994 Ford Escort LX connect to the fan control switch?
There is no fan control switch, and no direct connection to any sensor or switch on that vehicle. The system works like this. The computer(PCM) decides when to turn on the fan. The PCM looks at engine temperature from the ECT sensor, and AC input from the AC control head switches. When the PCM decides that you need the cooling fan to come on, it uses the cooling fan relay, and the cooling fan high…
I assume your talking about the engine fan, not the cabin fan. The engine fan is designed to come on only when the engine gets hot enough for it. I.E. the fan won't turn on in the dead of winter, or if you just start your car. The fan will turn on whenever the A/C is turned on though, as part of the Air cooling system.
Where is a cooling fan switch on a 2004 Chevrolet Impala Fans quit working but if you turn on the air conditioner the fans work so what else could it be?
If the engine cooling system fan, check the fuse/relay to see if the it has blown out. If not the fuse/relay, the cooling system temperature sensor switch may have failed. For he A/C system auxiliary cooling fan, the same trouble-shooting method. If you are referring to the cabin interior circulating air fan - check the fuse and/or the switch that controls the fan speed.
The (radiator) coolant cooling fan is activated by the coolant temp sensor which tells the computer to turn it on. There is also a cooling fan fuse and a cooling fan relay. Check the fan by connecting it straight to the battery,it must turn very fast and not just half fast. To check the relay (without getting it complicated) just swap it with the one next to it on the fuse box under the hood…
Should the outside fan of an HVAC unit turn on when the heat cycle is on or does it only operate when in the AC cycle?
If the question is about the motor fan or engine fan, the main function of this fan is cooling the radiator of the engine which in turn is cooling the water circulating inside the engine unto the radiator and back. This keeps the engine at a fairly operable temperature without overheating and damaging damaging its parts.
Is it normal for the cooling fan on a 1994 Camaro V6 to turn on when car is nearing red temperature?
I believe it turns on and off the fan (1 out of 2) that cools the engine according to the temperature it's at. If it doesn't work the engine may not know to turn the fan on and the engine could overheat. Here's a tip. When you turn on your A/C or Heater, both fans come on. The A/C cooling fan and the Engine Cooling fan.
The difference is that Passive cooling is just a heat sink that dissipates the heat into the air without the help of a fan. Active cooling is when you have a heat sink and a fan is directly blowing/sucking air thru the heat sink to cool it. The fan does not have to be on the heat sink as with some dell/gateway computers. The fan is on the plastic shroud, which in turn fits right…
You don't specify what type of car, but typically there are only a few possiblities. With the AC on (as long as the AC system is properly charged and working), look to see if the AC compressor is engaging. If so, the fan should also have power going to it. Check the wires attached at the fan motor for power. If there is power, the fan motor is failed. If not, then check the fuses…