Question about 2002 Jeep Liberty

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2002 jeep liberty heater blows warm not hot

I know nothing about fixing anything but if easy enough will give it a go . LOL
thought it could be coolant but coolant is full
whats next to check ?
bring in or check myself ?
limited income as i just bought the darn thing ( private party )

Posted by belvnmajk on

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  • belvnmajk Mar 16, 2009

    LOL Im sure Its a private after party all paid by me ... the temp gauge is going to half way and stays there . This is what u mean by checking the temp ?

  • belvnmajk Mar 16, 2009

    LOL Im sure Its a private after party all paid by me ... the temp gauge
    is going to half way and stays there . This is what u mean by checking
    the temp ?

  • belvnmajk Mar 16, 2009

    I should have mentioned when i turn the heater down to cold it does go cold but then back to hot only get warm. not sure if this makes any difference but was told i should mention it . is there a way to tell if the blend doors are working correctly ? no #'s on the gauge just the c and and h . Thank u so much for the help

  • belvnmajk Mar 16, 2009

    I actually noticed the fan come on then back off then came on a bit later then back off yesterday night so that seems to be working right

  • Richard Scordino May 11, 2010

    Are there numbers on the gauge? Half way up is probably OK. (temp is temperature on the gauge) That eliminatifies the thermostat. There are doors inside the black box that goes from the passenger side almost to your "gas foot." one of those doors may be staying part way open.They are called blend doors there are little brass things with a vacuum hose on one end about the size of a 35mm film cannister that move the doors. they are called motors (but they are really not motors) if they dont move at some point when working temp control then one is broken. OR, another question: is the electric fan on the radiator on all the time with the a/c off? It should only come on for a short time, then go off. And should never be on when engine is cold. You may want to check that.

  • Richard Scordino May 11, 2010

    private party?I'm insulted that I wasn't invited! Or are they having a private party with the money you gave them?
    OK, first thing you need to check is if engine is coming up to temp when running... Which engine? Most run at about 210 if not thermostat may be either missing or stuck open...
    Won't jam you with too much info all at once. check this first, don't check yourself in till were done!!!



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Richard Scordino

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Well, if the electric radiator fan isn't staying on, it pretty much has to be in the heater box. You may have a heater control valve on one of the hoses that go into the heater, but generally default on those is full heat. that leaves ether a blend door problem, an obstruction blocking air flow through the heater core (leaves, mouse nest or other) a blend door with partial movement, or a semi-plugged heater core (internal, inhibiting coolant flow). Since this is usually a long and involved job, you may want to find someone local that can help you." Hands-on" I can deal with almost anything but alas! I am too far away!! One more thing...If you have automatic climate control, see if there is a small (about the size of a quarter) vent somewhere on the lower dash anywhere. there is a sensor in there that may be dirty.(in the hose behind it)
Well it's getting late, its all darkified outside! Got to walk my doggie and go to sleep. I'ts 2AM!!! Good luck with it, wish I could help more!!!

Posted on Mar 16, 2009

  • Richard Scordino Mar 16, 2009

    Yes, I do check back on stuff...Any progress?




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Take your thermastat out and put it in a pan of boiling water if it opens then write again

Posted on Mar 19, 2009



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Just wondering if the problem was solved and how much it cost??? I am having the same problem!!

Posted on Dec 07, 2009

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