Why does my fan continue to run after shutting the engine off?

Why does my fan continue to run after shutting the engine 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. 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 radiator fan not turn off?

Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor.

When do you bypass the cooling fan relay?

NO! The fan will come on as soon as the engine gets slightly above normal running temperature. Under normal conditions, natural air flow will mean that the fan is not needed, so bypassing the relay will cause the engine to be slightly overcooled and will also waste fuel.

How to test / check a radiator fan?

HOW TO TEST/CHECK A RADIATOR FAN. Bypass coolant temp sensor, relay and computer If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

Where is the fan relay on a car?

Replacing the Fan Relay is one of the easiest things one can do. And the relay usually aren’t that expensive. The relay is typically located under the hood in the fuse block. If not there it will be under the dash in the secondary fuse block.

Why are the cooling fans not working on my car?

1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

Where is the relay on a radiator fan?

The fan relay is often located in the engine bay’s fuse box, but the best way is to check your repair manual to find where it is located. Testing a 4 pin relay is often very straightforward. Remove the relay and give 12 volts to pin 30 and 85. Ground pin 86 and check if there is voltage coming out from pin 87.

NO! The fan will come on as soon as the engine gets slightly above normal running temperature. Under normal conditions, natural air flow will mean that the fan is not needed, so bypassing the relay will cause the engine to be slightly overcooled and will also waste fuel.

What happens when a radiator relay goes bad?

A faulty or broken relay cannot deliver power to the cooling fans. In turn, the unpowered fans won’t run, leaving the radiator to its own devices. Deprived of the helpful influx of air from the cooling fans, the radiator cannot remove as much heat as it usually does.

How can I tell if my cooling fan relay is bad?

There are several ways to tell if a bad cooling fan relay is to blame for an overheated engine. The easiest method is to start the engine and then turn on the air conditioning. If the fan doesn’t engage, there may be something wrong with the cooling fan relay.