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Heater blowing cold air when i stop driving

The hot air blowing from my heater turns cold when I stop driving (it was blowing fine while driving). Once I start driving again, it turns back hot.

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 11 Answers

SOURCE: heater blowing cold air with coolant, fine with plain water

it sounds like the heater core is clogged bad if u know someone with a air compressor put a air nossel on it that you pull the trigger to blos air in to the heater core after you take the lines off i had to do this before on a jeep cherokee it did the job

Posted on Jan 11, 2009

  • 4 Answers

SOURCE: heater only blows out cold air

Check the valve that controls coolant flow to the cabin

Posted on Feb 12, 2009

  • 1 Answer

SOURCE: A/C will suddenly send out heat. Fiddling with knobs seems to help. What's wrong?

You have a broken wire connection between the temperature control knob and the circuit board behind the center dash console. Vibration causes the failure and once the control knob gets loose the solder connection fails.

For someone that knows how to remove the dash unit and can re-solder a couple of new wires this fix should take no more than 1 hour. Make sure that you apply loctite to the heat control knob spindle nut when you re-assemble it.

The dealer quoted me 750 dollars to fix this issue and I found out that it's a common failure for this year. I fixed mine virtually for free but it took some tools and about an hour of my time.

Posted on Jun 21, 2009

  • 750 Answers

SOURCE: The heater is blowing but the air is not hot. It

directional flaps i ducting may be stock in close positioncheck with an a/c tech to con ferm and repair

Posted on Oct 28, 2009

  • 290 Answers

SOURCE: 2004 toyota celica will not blow hot air for twenty minutes

If the engine temprature does not reach the normal level as it used to, it may be the coolant thermostat.

Iif it does, it could be air diverter gates not working properly, cold air blowing at a a light could point to that. The diverter gates are located under the dash.

It also coul be the valuve that controls the water to the heater core, but unlikely cause of the cold air at a light.

Posted on Jan 11, 2010

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