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Does radiator fan come on with heater?
The fan only runs when the furnace tells it to. On cooling, the fan will run only when the air conditioner is running.
Why does my car overheat only when the AC is on?
Engine overheating with AC on is generally caused by one of two possibilities. One, is increased engine load caused by a failing AC compressor. Plugged or blocked radiator condenser fins, fans not working efficiently or a water pump that is not circulating coolant could all cause overheating with AC on only.
Should the radiator fan turn on when AC is on?
When the AC compressor is activated, it is actually expected that the radiator fan runs. For instance, the radiator fan is needed when the temperature sensor of the cooling fluid in the lower tank reaches approximately 212F.
Can a broken radiator fan cause AC not to work?
Reason #5: Faulty Cooling Fans When fans aren’t properly functioning, your condenser may not receive properly cooling. Over time, this can cause your car to start emitting only hot air. The best way to check if the cooling fan is broken is through a visual inspection.
Why does the radiator fan not come on when the AC is on?
As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem.
What causes a car to overheat when the AC is on?
1 Compressor Overload. A malfunctioning AC compressor puts plenty of extra load on the engine. 2 Incompetent Cooling System. The cooling system is another component to examine if your car overheats when AC is on. 3 Faulty Fan. 4 Defective Engine Coolant Temperature Sensor.
When does an electric engine fan need to be on?
Your electric fan needs to turn on at certain times to keep your vehicle cool. The fan should turn on when your A/C is on, when the temperature rises to a certain point, when you shut off the vehicle but the engine is still too hot, etc. If your fan does not come on there are a number of things you will need to check.
Can a thermostat cause an engine to overheat?
A thermostat can cause engine overheating in many ways. It can be stuck shut, it can be stuck open, it can be partially open, it could be opening at the wrong temperature and it could just come apart and be broken. If you are overheating always check your thermostat, as it is one of the top causes of overheating.