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Thread: 1998 Jeep Cherokee heater and a/c problems

  1. #1
    Join Date
    Jul 2011

    Default 1998 Jeep Cherokee heater and a/c problems

    I don't get cold or hot air. When I turn the fan speed to 3 or 4 all air blows throught defrost vents regardless of A/C or heat setting. Heater core is fairly new, A/C has good charge. Any ideas?

  2. #2
    Join Date
    Jan 2007


    Hello chjeep98,

    What you descibe likely has to do with the blend door(s) and possibly with other doors and systems regarding door actuation. Diagnosis of this kind of condition is beyond the scope of what our manuals cover regarding the air conditioning system. We recommend using factory service information for diagnosis and service of you air conditioning system or seek professional assistance. It is worth mentioning that if you are an advanced do-it-yourselfer, it's quite possible that you can pinpoint the problem with the factory information and correct the condition yourself.

    For additional sources of information try: Helm Publications at 1-800-782-4356, Bentley publishers at 1-800-423-4595, Bishko Automobile Literature at 1-800-544-3312 or, for online ordering, try www.repairmanual.com (), www.helminc.com () or www.bentleypublishers.com () . For online options for factory service information try: www.nastf.org (http://www.nastf.org) () .

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