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

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

The best way to tell if your cooling switch is faulty is to listen to your engine while you drive. You know how your engine is supposed to sound, and if you notice that you don’t hear the fan as often as you normally do during your afternoon commute, you might have a failing switch.

How do you test a radiator fan control module?

You can test the cooling fan temperature switch using a test light.

1. Connect your test light to battery ground.
2. Start and idle the engine, and backprobe the connector terminals with the test light.
3. Wait for the engine to reach operating temperature.
4. Now backprobe the other wire at the connector.

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

AC blows hot air One of the first symptoms commonly associated with a fan relay is an AC that blows warm air. If the AC condenser fan relay fails, the AC condenser fan will not receive power and will not be able to cool the AC condenser.

Where is the relay switch for a radiator fan?

The fan relay is usually located near the bottom of the engine compartment on a metal frame member. The metal acts as a heat sink to keep the fan relay cool.

What tells the cooling fan to come on?

The engine temperature should trigger the fan to turn on. It will also turn the fan off once the engine has cooled to under 200 degrees. You may have heard of a part called the radiator fan switch or temperature fan switch. This is linked to a thermostat and works much like your home’s HVAC system.

Can you drive a car if the radiator fan is not working?

As such, you should never drive your vehicle if the cooling fan isn’t working even though you can. If the radiator does not have cool air blowing on it constantly, it will overheat eventually, so you’d need the perfect combination of weather and traffic to drive effectively without a radiator fan.

How can I tell if my radiator fan is working?

A simple way to check if the radiator fan is working is to start your engine and turn the air-conditioning system (A/C) to the maximum speed. If the fan is spinning, then it means that the fan motor, fuse, wiring, and relay are all working properly.

What sensor controls the radiator fan?

coolant temperature sensor
On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor.

What would cause a radiator fan to stop working?

The most common reasons a radiator fan is not working are luckily due to a blown fuse, bad relay, or a broken wire. It can also be caused by a faulty coolant temp sensor, low coolant level or the fan itself can be damaged.

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

If You Think The Problem Is The Cooling Fan Relay, Test It ! The quickest way to tell whether or not the electric fan(s) are working is to start the engine; let it reach normal operating temperature and then turn the A/C on. The cooling fan in the engine compartment should turn on to pull air through the radiator and A/C condenser.

How do I know if my electric fan is working?

The quickest way to tell whether or not the electric fan (s) are working is to start the engine. Then, let it reach normal operating temperature and then turn the A/C on. The cooling fan in the engine compartment, should turn on to pull air through the radiator and A/C condenser. A main cooling fan, for the radiator.

Why is my radiator fan not working on my Ford Ranger?

The ECU is responsible for starting the radiator fan once the engine gets hot. The ECU receives information from the temperature sensor which signals the ECU to initiate the fan. Therefore, if the temperature sensor is faulty, it is likely that the ECU is not receiving the proper signals and thus the fan is not working.

Where is the fan relay on a Chevy Silverado?

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.