Aux Fan Help

[Cisc0]

Originally Posted by JCL

When you say auxiliary fan, do you mean the electric fan under the hood, that helps out the engine-driven fan? If so, then it has nothing to do with the FSR.

If when you say auxiliary fan you mean the AC fan in the cabin, then it can be related to the FSR.

Assuming you mean the engine fan, it is switched with a thermostatic switch.

Correct JCL, I am referring to the Aux fan in front of the engine. In the winter time it will only turn on when the engine needed cooling, but now in the summer it is on as soon as I turn the vehicle on and it's at top speed. Where do you think I should start my diagnostic with this? Also it is a new fan purchased at the dealer, not saying that dealer does not sell defective parts, but they refuse to take back any electrical parts so I cannot return it.

[JCL]

Originally Posted by Cisc0

Correct JCL, I am referring to the Aux fan in front of the engine. In the winter time it will only turn on when the engine needed cooling, but now in the summer it is on as soon as I turn the vehicle on and it's at top speed. Where do you think I should start my diagnostic with this? Also it is a new fan purchased at the dealer, not saying that dealer does not sell defective parts, but they refuse to take back any electrical parts so I cannot return it.

OK, so let's drop the discussion of the FSR, that is just confusing things.

You need to start with a service manual, and troubleshooting the circuit with the temperature switch that controls the auxiliary fan.