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Re: cooling fans not turning on
Spin fans make sure there not seized check for power and ground to the fan connectors when the car is overheating if no power jump the temperture sensor or disconnect it depending on style fans should operate if no ground check wiring diagram and check ground connection and wire continuity if both power and ground are good replace fan brushes worn out
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check the plug connector at the rad cooling fan motor for a bad or damaged connection. then you can run jumper wires from the battery to the terminals on the fan motor itself. if it does not run then the fan motor needs replacing. this is a common problem.
This sounds like it's your radiator fan or engine bay fan continuing to run due to the hotter weather we are having. Some fans are programmed to cool the engine bay area if their thermostat triggers them. These conditions usually happen when weather becomes very hot and triggers the system to continue the fan due to excessive heat in the engine compartment. Usually not a bad thing and should stop when weather cools down. What is worse is if the fan doesn't work. Keep an eye on it and see if it continues to do this when weather cools down.
It can be faulty fan relay.The relay is not turning the system off.Or its wire short issue.Even with ignition off ,the fan relay is getting power so its not letting the fan to turn off.Bypass the fan control relay and see if still the fan works with ignition off or not.
For more troubleshooting check the link below:------
That is what it is supposed to do. There is a temperature switch that opens and closes as the coolant reaches certain temps. When it reads those temps it turns the fans on or off as needed. Your fan circuit is separate from your ignition to allow it to keep the engine cooled down after you shut the car off. This prevents possible damage to the engine due to heat. Today's engine have a lot more aluminum in them and it is affected by heat more so than the old cast iron engines. It is more noticable in warm weather because things heat faster and cool slower. Unless the fans run steady or not at all, you should be okay. Turning on the A/C will turn them on quicker and longer because it makes the engine work a lot harder. Hope this helps.
The cooling fans won't run until either the engine coolant temperature reaches about 218 degrees or the air conditioner/defroster are on. Once the engine reaches appx 218 degrees the fan will come on and run until the coolant temperature drops a few degrees and will then turn back off. If either the a/c or defrost are turned on then the cooling fan will begin to run to remove the heat from the a/c system and should stay on until either is turned off. If the engine is overheating in slow or stop and go traffic then the fan may not be working at all due to a bad fan motor or blown fuse.
over heating while stopped usually indicates that the radiator fan is not coming on ...when the engine is running hot you should be able to hear the fan running .. if it doesnt then suspect the thermal switch mounted on the radiator .. make sure the fan turns freely .. the fan is not needed when the car is moving so it wont heat up as long as you are driving .. but will do so when stopped if thats the trouble .. sometimes the thermal switch operates a relay that in turn operates the fan ..that could also cause the trouble ..
You are talking about the thermo electric cooling fan, its operation
is independent of the car's electical system. It is switched on and off
by the engine temperature. When you park, the engine heat soaks upward
to heat the thermostat turning the fan on. It will run until the engine
cools down and the thermostat switches it off. Quite normal operation.