Question about 1999 Jeep Cherokee
First I really need more info. Is the blower motor blowing air? Does the controls on the dash work? Before I can get you gong in the right direction I need to know so I can be more helpful. Thank you. I'll be waiting for your response.
Posted on Nov 28, 2012
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Posted on Jan 02, 2017
THis is a know problem with Jeep GC. If only one side is cold and the other is hot and there are no controls error codes. It is likely a broken temperature blend door on the faulty side (w/ dual controls). Dealer charges a lot to fix ~$800. There is a kit and instructions sold on EBAY to replace the part for $100. Seller claims that a relative novice can fix w/o removing the entire dash board as the dealer does. Has sold hundreds of kits....people seem satisfied....you may check it out. Search Heater Blend Door Jeep on ebay. Replacement parts are aluminum instead of OEM plastic.
Self Diagnostics on HVAC system. Jeep GC has built in diagnostics and will return error codes on the temp display if it is otherwise. Simple to display.
1) Press A/C and Recir button simutaneously
2) Rotate driver temp control knob clockwise then release buttons
3) If no controls error a code of "0" or "00" will be returned.
4) Error codes listings can be found on-line if anything but zero
Dealers charge $45 to run the same check
Posted on Jan 21, 2009
SOURCE: weak air-conditioning
you need to get it fixed maybee u have a hole in the lines a leak it blows cold only for 1 reason low freon .u could go to a car suplyer and get r12a and fill it at home
Posted on Aug 08, 2009
check vent functions to make sure in heat position vents are fully closed. turn temp switch back and fourth so hear movement of heat vents gl
Posted on Aug 29, 2009
blend door actuators. If you have the AZC system (automatic zone control) used in the limited (the one with dual digital readouts) you can use the on board diagnostic to read the code. while running, press the a/c and recirc buttons at same time then turn drivers temp control one click clockwise. release a/c and recirc buttons. If you have codes that show up, write them down and google search for these codes. It will tell you exactly what is wrong.
Posted on Nov 12, 2009
SOURCE: plenty of air but no heat
Check to see that the blend door linkage is hooked up. Doubtful it is heater core, as you had heat to one side and not the other. Check coolant control valve linkage, verify it is moving the coolant valve from off to on when you switch temperature from cold to hot. Verify you have coolant flow to the heater core by feeling the heater hoses where they enter the firewall. If all checks out well, then look at hvac controls individually.
Posted on Jan 06, 2010
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