Cooling Fans won’t shut off while running

[Glassmuseum]

Thanks Tom! This all makes sense. I have been verifying that the fans are on by cruising around my neighborhood and stopping to check. Agree they are hard to hear!

I pulled the radiator and I am attempting to fix the bunk Thermo fan switch threads. On top of the thread issue, the gasket that is held in with the tabs on the side of the rad started leaking not the first time I’ve had to do that. I have also tried to source a 71c thermostat but none of the usual 944 vendors have them so I orders a Mahle behr 80c to see if it’s more accurate. The wahler’s have been inconsistent with accurate opening temp the last 4 or so times I’ve ordered them.

Working on the leaks will update once I have one and will try no thermostat if the issue persists.

[soxnail]

There is a whole bunch of info here if you like.
https://forums.pelicanparts.com/porsche ... ystem.html

Also inside of the fan relay.....


Sox

[Glassmuseum]

There is a whole bunch of info here if you like.
https://forums.pelicanparts.com/porsche ... ystem.html

Also inside of the fan relay.....


Sox

Thank you. I read through the whole thread and sounds eerily similar. I am still chasing the issue but one thing is for sure, the last 4 wahler thermostats are not opening anywhere close to where they are rated. Not sure this going on but quality control seems to be severely lacking..

I got super frustrated because no one seems to stock OEM 71c thermostats so I just went to the local parts store and bought a 71C Motorad thermostat that after testing it , *starts* to open at 74 and fully open by 79c or so. I am about to try this one with a small hole
Drilled in the top and a used OEM radiator because the threads are pretty wrecked on my current one. Just waiting on that in the mail. I will report back.