Question about 2001 Chevrolet Impala

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Overheating/AC becomes hot

2001 Impala, after 15 minutes of running the AC turns to hot air, a slight vapor came out of the vents.Temp gauge pegs, water boils back into thje over flow.I put in a new thermostat, new water pump, still have the problem, Could it be the heater core?

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You need to check your fans first, I want you to  ck the fuses to your fans - out under teh hood is a fuse box and the fuses are marked, if you find a blown fuse you may have a bad fan motor. Look and you will see 2 fans. they both should run with the a/c on. Ck the fuse then ck the fan motor. The motor wears out and blows the fuse. Good hunting.

Posted on Jul 24, 2009

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The fans. The fans.

Posted on Jul 24, 2009

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Get a haynes repair manual at a parts dealer, Amazon, or your public library.
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You problem sounds like a "Blend Door" issue, you have these doors that open & close and everything in between to adjust air temp. These doors have a "peg" that is connected to an arm or wire just like on a ten speed bike to shift gears, that peg may have broken off.

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