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jamene schotsch Posted on Mar 22, 2017

Why does my pontiac torrent overheat when ac is on

My 2007 torrent only overheats when ac is on and I am idleing at a traffic light or stopped in a parking lot. when ac is turned off not overheating at all. the air also blows warm when this happens and the switch for normal vent in ..ac switches back and forth to max ac(recirculate cabin air). this happened last year around the same time, and we drained and replaced coolant that didn't correct the problem, then we were told it was the dual fans, which they lubed and they worked fine. Is this possibly a short and if so why does this keep happening? wonder if fans need to be replaced? could this be a fuse? how would I troubleshoot to figure out what this is besides taking to a mechanic? even so I would like to be informed myself. thanks for any help

1 Answer

clint read

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  • Posted on Mar 22, 2017
clint read
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Joined: Mar 15, 2012
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Sensors......Water temp sensor, air flow temp sensor, MAP sensor, Idle speed control solenoid, throttle position sensor, O2 sensor.........
Engaging AC draws on power from your motor, resulting in the ECU having to compensate to keep revs stable. Increased revs result in increased air flow, water flow, fuel flow & exhaust emissions.
Check belts for your AC pump first, as the same belt may drive your water pump. If it slips under load when the AC is on, ..................... Say no more. Next replace Water temp sensor. No luck..... ISC solenoid....
.

5 Related Answers

gfischer21

George Fischer

  • 236 Answers
  • Posted on Jun 24, 2009

SOURCE: When driving and in slow traffice my ac began to blow warm air

add fluid, check hoses for leaks, replace thermostat, flush the radiator. if non of those, check radiator for cracks and leaks, and finally have heater core checked

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Ruben Diaz

  • 514 Answers
  • Posted on Mar 28, 2011

SOURCE: car turns on ok gets

you know the water pump for that particular car is on the other side? is driven by the cam... either your water pump is not working,(to remove water pump you need special tool) did you change the termostat? temp. sensor?

Anonymous

  • 977 Answers
  • Posted on Aug 17, 2011

SOURCE: 2002 Honda Civic...The car is

it could be that the radiator is blocked,try using a good radiator cleaner & see if that makes any difference.....cheers.

Anonymous

  • 6 Answers
  • Posted on Jul 01, 2012

SOURCE: car overheats while idleing fan not turning on ac not blowing

Check the Fan switch at the bottom of the radiator, if you disconnect it and have a power feed to the switch then it isn't a fuse.Bridge the terminals and if the fan comes on then the fault is probably the switch.

montehammons

  • 5531 Answers
  • Posted on Jul 23, 2013

SOURCE: 2009 ford flex overheating

Probably need an automotive electrician to find out why the fans don't work. When AC is on, the AC fan should be on constantly. Coolant has to get quite hot for the regular radiator fan to come on, but sounds like the fans are the problem.

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The radiator fan on my 2007 bmw 525i works fine while car is driving. Once i stop at a red light or in traffic the the fan stops working, ac blows hot air and mins later the car overheats. The car has a...

My guess is that your electric fan is NOT operating at all. Under normal conditions, just going down the highway, your cooling system will function just fine without a fan running. The air flow through the radiator is adequate to keep things cool. However, when you stop, you quickly get into an "overheat" situation. Actually, you should be able to hear your fan begin operating when your engine temperature starts climbing or your air conditioner requires the fan to do its thing. Note: If you've ever severely overheated your engine, your problems may be worse than just a fan not running, but you really do need to confirm whether your fan is operating correctly, or not. Another note: I had a vehicle with a tendency to overheat when stopped. It turned out to be a faulty (leaking) pressure cap on the cooling system.
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when does it overheat ? wile driving at hiway speeds ? or at idle or wile driving in stop and go traffic ?

if it overheats on the hiway, supect a restricted radiator, or a blown head gasket or cracked cylinder head.

if it only over heats at idle or in stop and go traffic, supect no cooling fans.
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My torrent is showing that it is getting to hot and is showing in the red on the temperature gage. What is wrong?

Need more info. Does it overheat very quickly after you start driving? If so , probably needs new thermostat. Is it ok till you stop and idle for a while? If so , the cooling fans on the rad aren't coming on.
Your 2006 should still be under warranty , call your GM dealer .
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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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