I am going blind looking at the PET trying to find the part number for the sensor that activates the fan in the engine compartment. I would appreciate it if someone would let me know what the part number is.

 

Call Roger in parts at Plano Porsche (previously Boardwalk). Tell him Brock from Arkansas sent you. He will help you for sure.

http://www.porscheplanotexas.com

 

There are multiple sensors as there are multiple ways for the fan to be activated:

Switching stages:

1st stage:
Ignition ON (for longer than 1sec.) or engine running (actuated by fuel pump relay via booster resistance cable).

2nd stage:
At coolant temperature of approx. 105 °C or engine compartment temperature of approx. 78 °C (OFF at approx. 60 °C).

After-run phase:
Requirement: Engine compartment temperature with ignition OFF > 25 °C

After-run ON:
For 3 minutes at engine compartment temperature > 78 °C. The switch-on condition of > 78 °C is then checked every 10 seconds.
The after-run phase is active for max. 40 minutes.

 

look next to the power steering pump. its next to it

 

I thought mine was a sensor, turned out to be a loose wire right where it goes into the fan. just a check

 

You can also give us a call to find out via the phone or you can check it out on our parts catalog here.

-Luccia

 

poor design...should be fail on, not fail off. Of course with fuel pump running.