944 Question, Fan stays on Options

[Randal]

I know this is off topic, but just looking for help.

On Friday I drove my son's 944 down to Costco. It was a hot day. The fan stayed on when I left the car to go into the store and it was still on when I returned.

Note: Operating temperatures were mid range, which is what I'd expect, given that a new radiator was put into this car.

When I got home the fan wouldn't go off, unless I unplugged it.

Another data point: The second fan wasn't on, even though I had been using the AC.

So I read one of the repair manuals and they suggested, if the fan remained on, that the coolant switch (in the radiator) was faulty.

So got a new switch, took the fan assembly out of the car and swapped out the coolant switch. I also tested both fans and they work.

So I put the fan assembly back into the car and when I reconnected the power, with the car cold, the fan went on.

I'm not sure what to check next, but any suggestions will be appreciated.
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Randal

www.barrickpickeringracing.com