what causes my car to overheat at a stop light in traffic but goes back to normal when im driving

Asked by Jul 15, 2013 at 04:35 PM about the Ford Crown Victoria

Question type: Maintenance & Repair

When I am driving around town i have noticed that my temperature guage reads alittle
above the half way mark on the dash, but when i have to come to a stop and sit idle, it
starts to heat up really fast, almost to the boiling point, then when i start moving it goes
back down, what would cause this and how do i fix it, thanks

5 Answers

....okay, you have a fan that is supposed to come on when temperatures exceed 185..do not hear it runnin'?

3 of 3 people found this helpful.

I should talk to the designers there from experience 5 blades = quiet 6 blades = noisy~

1 of 1 people found this helpful.
26,225

Most cars don't need a fan over 30mph. I'll bet I change out 4 a month on our fleet of Crown Vics. Change out the module too (attached to the fan). It's a High current component and usually gets strained with a failing fan motor. You should also hear the fan run any time you turn on the AC.

5 of 5 people found this helpful.

grabbleygook~ here's a picture of that diddy~

5 of 5 people found this helpful.
26,225

The electric cooling fan is controlled by the PCM which in turn, monitors the engine coolant temperature through a cylinder head temperature sensor. If that sensor fails, the fan will run constantly (as a fail safe) and the "Check Engine" light will come on. At least, that's how it works on our Fleet of 800 Crown Vic Police Interceptors.

1 of 1 people found this helpful.

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