Quote:
Originally posted by tenknots
Installed the t-stat in my car last night and at idle with the ac on, it will hit 100 (fan comes on). I don't think I've found the problem yet since without the t-stat the car never got over 85 during the same conditions.
I'm missing something, but it will eventually come to me.
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Don't forget, a properly functioning thermostat moderates the engine temperature, not just lowers it. Our T-stats are closed until I think 85 C, and will make the temperature go up faster until it reaches this point. It then opens slowly until its fully open at 94. Idling with A/C on a hot humid day normally = the highest temperatures you'll see. 100 under those conditions is perfectly acceptable in my book. At 105 C or if the refrigerant pressure gets too high the electric fan should come on (either condition will cause it to do so). If it goes up after that you've really got a problem.