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Is the radiator fan always supposed to be running?
Temperature will often determine the time that a radiator fan starts up. A temperature-sensitive switch functions to turn the fan on and off periodically. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit.
Why is my AC not turning off?
When your air conditioning system keeps running and never seems to shut off, the problem could be linked to a number of malfunctioning components – frozen evaporator coils, a clogged air filter, a bad electrical relay switch that needs to be replaced, the fan blowing constantly, dirty condenser coils, a bad thermostat.
How long should fan run after AC turns off?
Your HVAC fan should turn on and off with the rest of your heating and cooling system. It’s normal for the fan to kick on a couple of minutes before heating starts or to stay on for a couple of minutes after cooling stops, but your fan shouldn’t run for hours on its own.
What happens when your car fan keeps running?
It’s normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool. However, if the fan is running for an extended period, the fan itself can become damaged due to overuse. It’s possible you may have a module or relay failing in your car.
Why does my Cavalier radiator fan keep coming on?
If the sensor does not have the right resistance to change the voltage returning to the computer the wrong signal will be sent. Inspect the radiator fan by spinning it with the fingers and see if it is free moving. Do this only with the engine off and cool. The fan can come on at any time even with the key off when the engine is warm.
Can a car fan come on when the engine is off?
The fan can come on at any time even with the key off when the engine is warm. Install a jumper wire to the red wire at the harness connector and the black wire to ground. Touch the red jumper to battery positive side and the fan should operate if it is not burnt out.
Why does my VW Jetta fan keep running?
The fan can run after the engine shuts off, but I’ve read about failures where the fan keeps running until the battery is dead. A sticking relay or switch, can jar itself loose while driving. But if it sticks once, it will likely do it again. You might not have given it enough time to shut off,…. on the other hand, keep an eye on it.
Why does my alternator run when I Turn Off the car?
Generally, an OEM harness will not have the problem of alternator “run-on”, as there is usually a resistance wire in the dash harness to keep this from happening. Solution: To figure out where the problem exists, start the car and with the key in the ON position and the car running, turn off the key.