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Old 07-08-2022, 12:07 PM
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Join Date: Oct 2007
Cobra Make, Engine: Superformance, Roush 402R
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Default Overheating When Idling

Recently during rush hour I was stuck in a long line to turn left and just idling for maybe 10 minutes the car started to overheat. I thought it might have been caused by an air pocket so I decided I'm going to give it a good engine/rad coolant flush.

After reading some threads today on Clubcobra I decided to check the fans because I don't remember them coming on when it overheated. It turns out the relay doesn't kick in at all and the manual switch on the dashboard doesn't work either. I have to assume this is the reason for overheating when idling, correct? At speed the car always runs about 80-90 degrees.

I understand replacing the relay sensor by the rad is a pain in the ass so I want to start by at least fixing the manual switch for now.

I'm guessing it's a little unusual that both the relay and manual switch were to go at the same time. How would I go about figuring out where the problem lies?
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