Why is the radiator fan not working in my Dodge Durango?

There can be several reasons why the radiator fan is not working in your Dodge Durango. Here are some possible causes to consider:
1. Short in the signal wire: One user on the Dodge Durango Forum mentioned that they had a similar issue and suspected a short in the signal wire. They were able to get the fan to come on by wiggling the wire.
2. Fuse: The radiator fan not working could be due to a blown fuse. It is recommended to check the fuse related to the radiator fan to see if it needs to be replaced.
3. Coolant level: Another potential cause is a low coolant level. It is advised to check the coolant level and add coolant if necessary. However, it is important to let the engine cool down before adding coolant to avoid drastic temperature changes.
4. Fan clutch: The fan clutch is responsible for engaging and disengaging the radiator fan. Over time, the fan clutch can wear out and fail to function properly. If everything else seems fine, it is worth considering the possibility that the fan clutch needs to be replaced.
5. Wiring issues: Wiring problems, such as a faulty electrical connector or broken wire, can also prevent the radiator fan from working. It may be necessary to inspect the wiring and connections to identify any issues.
It is important to note that these are just potential causes and further diagnosis may be required to pinpoint the exact problem. If you are not comfortable troubleshooting the issue yourself, it is recommended to consult a professional mechanic for assistance.
I hope this helps! Let me know if you have any other questions.

When should radiator fan turn on?

between 200 and 230 degrees Fahrenheit
In most vehicles, the radiator fan is programmed to turn on when the engine coolant reaches a temperature between 200 and 230 degrees Fahrenheit (93 to 110 degrees Celsius). However, some vehicles may have different temperature thresholds for the radiator fan to activate.

Can I drive car if radiator fan is not working?

Can I Drive My Car If The Fan Is Not Working? Yes, your car can still run without a radiator fan, but you never should. Your vehicle’s cooling system is crucial to the engine’s performance and lifespan. Every time your engine overheats, you’re causing tremendous damage to the precious engine.

Should radiator fan run when AC is on?

First, run the AC and see if the radiator fan runs: it’s supposed to run with the AC by default. If it doesn’t run, you likely have a low level of refrigerant in the system or a faulty switch or a sensor, or a bad fan motor, fuse, relay, or a wiring problem.

What sensor turns on the radiator fan?

Yes, the coolant temperature sensor is an important component in controlling the radiator fan in many modern vehicles. The coolant temperature sensor monitors the temperature of the engine coolant and sends this information to the engine control module (ECM), which uses it to determine when to turn on the radiator fan.

When should the radiator fan kick on?

In most vehicles, the radiator fan is programmed to turn on when the engine coolant reaches a temperature between 200 and 230 degrees Fahrenheit (93 to 110 degrees Celsius). However, some vehicles may have different temperature thresholds for the radiator fan to activate.

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

You might see a temperature light pop up on your dashboard. In this case stop driving immediately. And turn off your car. The fifth symptom is a blown cooling fan fuse.

What would cause a radiator fan to stop working?

The most common reasons for a radiator fan not working can be a blown-out fuse, a bad relay, or a broken wire. The faulty coolant temp sensor might also be a reason behind it.

What tells the radiator fan to turn on?

On Modern cars (last 15 years or so), The coolant temperature sensor relays temperature info to the Engine Computer (PCM). At the appropriate temperature the PCM will turn on the radiator cooling fan to cool the coolant.

Is the radiator fan always supposed to be running?

In normal operation, no, the radiator fan doesn’t run all the time. The fan is hooked to a sensor that measures the coolant temperature in the radiator, and when the temperature gets a little on the high side, the sensor will (basically) send a signal that turns the fan on.

Can a bad thermostat cause fan not to come on?

An unlikely, but possible, cause is a bad thermostat. Try turning the Fan switch to the “On” position to see if the blower comes on. Watch the video. If the blower operates in the “On” position and does not operate when the air conditioner is running, you may have a bad thermostat.