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Car overheats when ac is shut off - 2004 Oldsmobile Alero

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The AC blocks the air flow to the radiator, causing it to heat up.


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Posted on Nov 27, 2012

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The AC blocks the air flow to the radiator, causing it to heat up.---------------------------------------------------------------------------------------
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Posted on Nov 27, 2012

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1 Answer

I was driving and my 95 olds 98 regency said hot...ac disabled and then the car shut off while driving why?


If it really did overheat, the engine may have shut off as a safety factor. Or the engine could have locked up.

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Car overheats when i turn on the ac


check the cooling fan it should be on when the ac is on

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Car overheats and AC stops blowing cold, then temp guage eventually goes back down and AC starts blowing cold, after a while overheats again and AC stops blowing cold again. problem just started after a...


Your AC system is supposed to shut down if the engine is hot, as a safety device-make sure when the ac is running , the radiator fan is blowing-it may not be, caused by either a bad relay, blown fuse or a bad fan motor. Make sure your antifreeze is fully up to level, and if you haven't done it in the past 2 or 3 years, get the cooling system serviced with a new thermostat-cheap insurance, you do NOT want to overheat that aluminum engine, because if you do, it will be toast.

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Engine Overheats when AC is on..


It sounds like your AC compressor bearings may be overheating causing excessive drag/loading on the engine. No easy way to check this unless you can take the serpentine belt off when the car won't start and see if it is really hard to turn the compressor shaft.

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Ac runs cold then hot


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ROUGH IDLING AND OVERHEATING


IT SURE SOUNDS LIKE A BLOWN HEAD GASKET TO ME, BUT THAT WOULD DEPEND ON WHO DID THE VALVE JOB. WAS THIS A LICENSED MECHANIC? PERHAPS IF THE HEAD WAS REMOVED, AND THE OLD HEAD GASKET REUSED. THAT WOULD CAUSE IT TO OVERHEAT AND MISFIRE. I HOPE THIS HELPS. THANKS FOR USING FIX-YA AND FOR AN HONEST RATING.

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Could be a bad sensor temperature sensor that is telling Fan to shut off . Fans should kick on high the moment the AC is swithced to the on position. I would also check Thermostat

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1 Answer

My car overheat only when i turn on the ac


GET COOLING FANS CHECKED SOUNDS LIKE A DODGEY FAN OR FAN SWITCH

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1 Answer

Overheating


the AC puts an extra load on the cooling system in your car. a short descriptive reason is that the AC condensor is in front of the radiator therefore the heat it emits is dumped into the radiator cooling fins. so when your car overheats when the AC is on and dont overheat when its off its an early warning sign that something in your engine cooling system is going bad. such as thermastat or waterpump. or it could mean your radiator need flushing from the inside and the fins could be clogged with dirt and bugs that get past the grille. try cleaning the cooling system fins first the ac condensor and radiator see if water will sprat through the grill into the fan with your water hose. then if cleaning check all the other items i mentioned good luck james

Jul 06, 2008 | 2000 Cadillac DeVille

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