Question about 2000 GMC Jimmy

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200 gmc jimmy st heater

When i have the air on it blowns cold just fine when i switch to heat the air doesent blow as hard and is cold

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  • pesha_smith Nov 21, 2008

    my 200 jimmy is not throwing enough heat. blower works fine just throws colder air already changed the thermostat, would flushing it out work do ya think??

  • Anonymous Nov 28, 2008

    my car trow air but it dont trow hot air

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Had similar problem in my 2000 Jimmy. No hot air from heater. Had the shop (Midas) disconnect heater hoses at the fire wall and blow out the heater core with air hose. Got rust and junk blown out. Hooked up and flushed system with new anti freeze. Got lots of heat now.

Posted on Nov 09, 2008

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Check that the gate valve is operating properly on your heating system,
check that you have the propper amount of coolant and the propper mixture,
check the temperature of your thermostat and that it is working propperly,
To test your thermostat remove it from the vehicle and boil a pot of water on the stove, when the water is boiling drop the thermostat in and it should open, if it doesn't it is no good.
I would also recommend installling a195 degree thermostat if you live in a cooler climate.

Posted on Oct 25, 2008

  • Fred Kenmuir Oct 25, 2008

    Sorry also check that your heater and radiator lines are not collapsing inside.

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