Why does my radiator fan stay on when my car is off?
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. It’s possible you may have a module or relay failing in your car. Have a mechanic inspect the electrical portion of your cooling system to be sure it’s running correctly.
Why does my cooling fan keep running?
Cooling fans stay on at all times If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times.
How do I stop my radiator fan from running?
My Cooling Fan Won’t Stop Running on My Radiator
- Open the hood and locate the fuse relay box on the driver’s fenderwell. Remove the lid.
- Look on the inside of the lid and for the mapping of the fuses and relays with their location. Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one.
Why does my fan come on as soon as I start my car?
Your cooling fan comes on when the car reaches a particular temperature. The trigger is the thermostat in the radiator of your vehicle. It is what sends the signal for the fan. Most cars will switch the cooling fan when the coolant temperature reaches 85 degrees Celsius (185 degrees Fahrenheit).
When should your cooling fan turn on?
To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature. Most fans should come on when the coolant reaches about 200 to 230 degrees.
How do you test a fan switch on a car?
The ohmeter should be turned on and have a reading of high resistance. When the water reaches between 180 to 220 degrees Fahrenheit, the switch should turn on and the resistance seen by the ohmmeter should change to zero. If the resistance does not change to zero, then the switch is bad.
How long does a radiator fan take to turn on?
This typically takes about 15-20 minutes for the engine to reach the right temperature for the radiator fan to turn on in older cars. If there’s a problem with the engine’s temperature, then this can damage the radiator.
Is car fan supposed to run constantly?
An electric fan SHOULD NOT run all the time. A mechanical fan WILL spin as long as the engine is running, but it will only ‘lock up’ when needed. Both radiator fans should always run when the coolant temperature sensor in the bottom tank of the radiator reaches about 212*F.
How long should a car fan run?
In fact, in some vehicles, the fan may run up to five minutes and sometimes longer. When the engine is running; the coolant circulates from the engine and flows to the radiator where heat is dissipated. An electric fan SHOULD NOT run all the time.