Question about 2000 Chevrolet Blazer

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The heat on my 2000 Chevy blazer LT 4x4 isn't coming out hot but

Why is the heat on my 2000 chevy blazer coming out cold but on the highway it comes out light warm ?

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  • yvsys Jan 16, 2009

    the coolant is full and thermostat is new

  • yvsys Jan 16, 2009

    the hose coming from the radiator to the thermostat, I believe so

  • yvsys Jan 16, 2009

    is there a way clean it out ???

  • CHUNK3323 Apr 29, 2009

    WHEN I TURN THE HEATER ON IT JUST BLOWS COLD AIR UNLESS IM GOING OVER 45 MPH

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Did you check the level of the coolant? do it while it is running............but make sure it is cooled off.

Posted on Jan 16, 2009

  • LAYNRAIL
    LAYNRAIL Jan 16, 2009

    like tink said, sounds like the heater core is plugged

  • LAYNRAIL
    LAYNRAIL Jan 20, 2009

    you can usually get it cleaned out by removing the two hoses from the heater core and then using a hose flush out the core through both the inlets/outlets.

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  • 7 Answers

I had the same problem with mine and i reversed flushed my heater core with a garden hose and it has been fine ever sence

Posted on Apr 30, 2009

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  • 1 Answer

Sounds like you have a bad thermostat or a plugged heater core do you have pressure in the top radiator hose?

Posted on Jan 16, 2009

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