Question about 2000 Jeep Grand Cherokee
I know the heat and A/C is working correctly, and the fan is definitely working, it seems as if an unseen vent door is closed/stuck,I can feel the warm, or cold air seeping out, but no force behind it
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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
there are a couple of things you should check. first thing check that the fan and swirl cage are still together. this can be done two ways. simply turn either the ac or heat on and turn the blower up to hi quickly and listen to see if you hear the whine of the motor along with the force of the air go up. if you only hear the whine of the motor go up, there is your problem. most require a locking washer or a pressed cap. you can either be enginuitive on how you get it to stop spinning or take it to an automotive mechanic. next thing that could be wrong is the speed control knob could be broken. you can test that by either hooking up a known good blower motor and turning it up and down. seeing if it changes speeds or testing it with a multi meter. now if its air temp your having a problem with directly under the center of the dash behind a black plastic panel there is an ambiant temp baffle that controls just what its name is. there is a servo attached to it via a metalic rod. that is the only other thing i can think of..
Posted on Jan 25, 2009
I agree, these vehicles have a problem with the blend doors and since the accuators hit the door when it opens and closes, it breaks the doors. and it's a huge job to replace them.
Posted on Mar 12, 2009
There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.
Posted on Jul 01, 2009
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