grand prix gt overheating when ac is on

ballingrandprix · 05-14-2007, 06:45 PM

hey everyone i have a 2002 grand prix gt and 3800 series 2 when i turn on the ac the car starts getting hott over 210 about 220 and the other day it got so hot the temp light came on i had to turn off ac and let it relax for ten mix the i drove and it came back down to normal temp but both fans are on i just changed the thermostat and the temp colant sesor do u think u know what the problem is???

vamc · 05-14-2007, 10:48 PM

I dont think the fan is turning on. Could be a bad resister.

richtazz · 05-15-2007, 07:03 AM

Check for debris between the radiator and a/c condenser. There may also be air in the cooling system form when you changed the CTS, coolant level sensor and t-stat.

BNaylor · 05-15-2007, 11:21 AM

Welcome to AF.

When was the last cooling system service (flush and anti-freeze replacement) and are you still running the original Dex-Cool?

In most cases a good cooling system service/flush will take care of a problem where the engine gets hot with the A/C on even though the cooling fans are supposedly turning on.

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