Why does my fan come on as soon as I start my car?

If the fan comes on, you may have a bad temperature sensor or gauge. 2. A cooling fan temperature switch (or sensor, in some vehicles) can also get stuck, which may cause the fan to run continuously any time you turn the ignition key on or start the engine.

Why does my engine fan stay on while driving?

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.

Is it normal for fan to come on after driving?

The fan turns on when you’ve stopped driving because no more cooling air is flowing into the engine bay. This causes the temperature to rise, automatically triggering the fan. Once the temperature has dropped again (as it will do because the engine has stopped running), the fan should cut out.

What makes radiator fan come on?

The radiator fan turns on because the temperature of the engine coolant has risen to a level where a temperature sensor determines air around the radiator is not taking away sufficient heat. To avoid a further rise of temperature, the fan induces air flow.

How do I know if my cooling fan relay is bad?

Bad Cooling Fan Relay Symptoms

1. The engine runs hot or overheats.
2. The cooling fans don’t work.
3. The cooling fans keep running.
4. Warning lights.
5. Poor air conditioning performance.
6. Swapping Relays.
7. Measuring the Relay Coil’s Resistance.
8. Listening for Noises.

What does a bad radiator fan sound like?

A loud whirring Noise In some cases, when the radiator cooling fan motor fails, you’ll notice a loud clicking or whirring noise that changes as you rev your engine. Bad radiator fan noise might be so loud, but fixing it on time will save you from the expensive repair costs.

How do I know if my radiator fan fuse is bad?

These are the most common signs of a faulty radiator fan assembly in need of replacement:

1. Engine Overheating. When the radiator fan isn’t functioning properly, it is not able to adequately cool down the car’s engine.
2. Air Conditioner Function Diminished.
3. Loud Noise Coming From Radiator Fan.

How do you test a radiator fan?

How to Check a Radiator Fan

1. Determine whether your radiator fan is manual or electric.
2. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on.
3. Use the volt meter to test if there is power to the wires.
4. Normal voltage for a radiator fan is around 12 volts.

Why does my car radiator cooling fan keep running?

The situation when the car radiator cooling fan keeps running constantly can be caused mostly by a failing coolant temperature sensor or its wiring, broken fan start relay, damage to the electrical wires, electronic engine control unit (ECU) problems.

What happens when you turn on the fan in your car?

The fan should also turn on after switching on the air conditioner. Positioned between the radiator and engine, cooling fans blow cooling air through the car’s radiator to cool down the heated water and coolant mixture that flows through the radiator. The radiator fans blow cooling air through the car’s radiator.

How do I know if my radiator fan motor is bad?

The most common symptom of a faulty cooling radiator fan motor is that the cooling fan does not come on when you start the car. If the cooling fan motor burns out, the cooling fans will then, in turn, be disabled.

Where is the radiator fan on a car?

The radiator fan is positioned between the radiator and the engine and is in charge of cooling the car and keeping the occupants at a comfortable temperature level.