Car overheats, returns to normal when heat is turned on

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Old Sep 5, 2006 | 05:55 PM
  #1  
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Default Car overheats, returns to normal when heat is turned on

Is this the thermostat?
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Old Sep 5, 2006 | 06:09 PM
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Default Re: Car overheats, returns to normal when heat is turned on (thenick)

Depends. When at op. temp feel your upper and lower hoses. If the lower one is ice cold, whereas the upper one is hot, your thermostats not opening all the way, replace it.
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Old Sep 5, 2006 | 06:45 PM
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Default Re: Car overheats, returns to normal when heat is turned on (CRXperiment)

Thanks
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Old Sep 5, 2006 | 07:15 PM
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Default Re: Car overheats, returns to normal when heat is turned on (thenick)

could also be heater core. do you notice any water leaking on the inside of your car? that is a dead giveaway
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Old Sep 5, 2006 | 07:22 PM
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Default Re: Car overheats, returns to normal when heat is turned on (dennisraymondhall)

Naw, no water. Although the other day when my heat was on it was coming out cold. Then after shutting it off and doing it again it came out hot. Hasn't happened since then.
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Old Sep 5, 2006 | 07:43 PM
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Default Re: Car overheats, returns to normal when heat is turned on (thenick)

i'd check the termostat first. it's easy to get to, a new one can be had for less than $10, and they don't take long to replace.
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Old Sep 5, 2006 | 07:46 PM
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Default Re: Car overheats, returns to normal when heat is turned on (90si-rex)

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Old Sep 5, 2006 | 09:44 PM
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Default Re: Car overheats, returns to normal when heat is turned on (slpnz6)

sounds like the thermostat to me.
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