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.

What sensor turns on 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.

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

Bad Radiator Fan Symptoms

1. Fan Doesn’t Come On. The most common symptom that the radiator fan has gone bad is that it will stop working.
2. Blown Radiator Fan Fuse. Another reason the fan will stop working is if it blows a fuse.
3. Vehicle Overheating.
4. Poor A/C Performance.
5. Whirring Noises.

How do I know if my radiator 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.

How do I get my fan to work again?

Here’s how to get started to see if a simple fix is within reach to make your fan work again.

1. Check the Cord.
2. Check Your Circuit Breaker.
3. Check for Power to Your Outlet.
4. Check the Fan Fuse.
5. Replace the Cord.
6. Clean the Fan.
7. Grease the Motor.
8. Call Customer Support.

How do you test a radiator fan motor?

How to Test Radiator Fan with Multimeter

1. Locate the fan on your car.
2. Remove the fan motor connector.
3. Identify the terminals that supply current to the motor.
4. Set the multimeter to read volts by moving the rotary switch.
5. Connect the multimeter probes to the terminals on the connector.
6. Check the multimeter.

How can you tell if an IOD fuse is blown?

Blown IOD Fuse Symptoms:

1. Parasitic battery drain.
2. No fuse error message.
3. Dash cluster blinking wildly.
4. Engine won’t crank.
5. Radio, dome lights, and cargo lights quite working.
6. Windows wouldn’t go down.
7. Horn sounding when the doors are locked.

What relay controls the radiator fan?

cooling fan relay
The cooling fan relay is the relay that controls the engine’s cooling fans. When the correct parameters are met, a temperature switch or the computer will activate the relay, which will allow power to the fans.

Why is my radiator fan not working on my Dodge Caravan?

Once the temp gets so hot, the ECU commands the radiator fan to come on. If your Caravan has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. You’ll need to locate and test the engine temp sensor.

How do I know if my fan is bad in my caravan?

The fan wiring is some of the more vulnerable wiring in your Caravan. You can test the voltage going from the fan relay to the fan itself. If it is getting 12+ volts, the fan should be coming on. But if it’s not, which means the fan has gone bad.

Why is my fan clutch not working on my Dodge Caravan?

Like any other clutch, a fan clutch will wear out over time. If everything else seems on the up and up, the springs in the fan clutch have worn past the point of proper function and can no longer do their job. There are many reasons why your Dodge Caravan’s radiator fan is not working.

What happens if you put low coolant in a Dodge Caravan?

Your Caravan’s radiator fan will not kick on. If you do have low coolant, don’t fill it up until the engine has cooled off. Adding coolant to a radiator dry enough not to trigger the engine temp sensor can cause problems from drastic temperature change. Let it cool down first.