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2005 Chevrolet Malibu Question: My car overheats in warm weather IF I'm driving slow and/or without A/C on.

 

Question

LisaPal, New Orleans, LA, August 22, 2013, 16:30
 Rookie

I've had the thermostat changed and I think someone did something to the radiator or water pump a while ago, but so far, no fix has worked, or at least not for long. It only overheats in hot weather in stop and go driving or low speeds. If I put the A/C on, this fixes it. If I'm on the interstate going fast, the temp is generally stable, at least for shorter drives. I'm tired of paying people for fixes that don't fix the problem.

2 Answers
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  • Medium-star Best Answer
    August 22, 2013, 17:31
     Journeyman

    your fan may not be working propperly, when you turn on th A/C the computer turns the fan on continuously,
    when not running A/C it's controlled by a different circuit check all fan fuses and relays also have coolant temp sensor checked it maybe out of range...coolant level should be checked as well when engine is cold of course..

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  • Answer #2

    August 22, 2013, 22:19
    Profile_thumbnail
     Master

    See Answer#1...you need to heat up vehicle and see if the cooling fan is operating.

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    LisaPal, August 23, 2013, 21:46
     Rookie

    Thanks SO MUCH! I will ask that someone check as you suggest. I figured that the fact that running the A/C prevents the overheating problem was a big clue to figure this out.

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    Tbone1980, August 25, 2013, 19:28
     Journeyman

    NO problem, post results so others may benefit..

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