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2002 grand Cherokee...Heater/ac only blows hot...Freon level is good, compressor works, cold coming out of compressor, what givs?

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  • Cars & Trucks Master
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Blend door switches between hot and cold. Could have stuck door or bad actuator. Inside dash. Not easy to get to.

Posted on May 02, 2015

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1 Answer

Cherokee ac blower fuse


Its not the fan motor. That would blow a different fuse. IT could be the compressor clutch that is shorting out.

Apr 29, 2013 | 2002 Jeep Grand Cherokee

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I have a 2002 grand cherokee I put freeion in the thing and it stills blow hot air. You have to take a stick and push the clutch in then the compressor runs .but still blows hot air out.The gauge says it...


Do this:
When the vehicle is COLD, start it and start the a/c and see if it is cold then. If so, your heater temperature controller is stuck in the HOT position. Check the hoses going from it and if this is true, replace the controller. The a/c is running, but the controller is sending hot water to the passenger compartment heater radiator.

Gary

Aug 07, 2011 | 2002 Jeep Grand Cherokee

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1997 Nissan 4 cylinder truck AC works excellent throwing snowballs cold air, then it will blow hot air. Relay switch and clutch has been replaced....Did not fix problem!


sounds like compressor isn't working properly or heater vacuum is opening vent to heater core.try turning on ac and if it cuts on and off repeatedly every few seconds the freon level is not correct or high pressure switch may not be working make sure radiator fan comes on when ac is on.if all this is working properly check vacuum hoses to heater may be opening vent doors to heater.hope this helps

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AC dont work and heater door seems stuck in the heating position


You seem to be on the right track. You can manually jump the compressor clutch, to come on and see if she blows cold air. Follow
the compressor clutch wiring back to the evaporator. There should be
a 2 wire harness there with a connector. Take the wiring connector off
and install a small jumper wire between the 2 terminals. this should
automatically make your compressor clutch engage , regardless of
freon level or head pressure switch condition. You may also have a
vacumm leak, which controls your heater damper actuator. Check all
the vacumm hose in the engine bay and try to locate the damper in
the dash, so you can manually pull the damper open, to see how it
helps your situation.Good luck.

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Check the coolant level, sounds like you may be slightly low....Be sure heater is on high when filling the system....Look for any air bleeds...

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Grand prix 3800 blowing only hot air please help


check the temp control switch in the dash

Jun 19, 2009 | 2002 Pontiac Grand Prix

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2002 pontiac grand prix gt AC only blows hot air compressor full of freon and clutch spinning good temp control actuators working corectly narrow ac tube at firewall very cold thicker ac tube at firewall...


i had same problem 2 years ago. the actuator door tube was snapped in half and i used acquarium tubing to splice together. The tube runs along the passenger front well well inside engine and meets under the battery carriage. I could not tell anything was wrong without removing the battery to get a closer look. works like a champ now.

Also: there is also an inline venturi filter that fits in the aluminum tubing on the compressor, it may be clogged. You will have to have the freon sucked out to replace the filter. Check back with me so I can help more if this doesnt solve your problem.

Jun 19, 2009 | 2002 Jeep Grand Cherokee

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