Question about 2004 Jeep Grand Cherokee
The system is charged (plenty of freon).
When I start the Jeep and turn on AC it works just fine. Depending on how hot and humid it is outside the AC will just cut out (blower remains on but no cold air). If I turn the AC off for 15 mins to half an hour I get cold air again; however, it only runs for a while and I lose the cold air. I'm pretty sure the AC Clutch is engaged throughout this entire process.
Hi: There will be a drain from the evaporator ( the part that freezes for your cold air) If it is clogged the ice will back up and stop the cooling. This is especially prevelant in an area with high humidity. If you are in a high humidity area and run it continously at the highest setting this will also happen. Set the cold control in the middle and see what happens. If it is working correctly you will see a puddle of water under the Jeep when you stop. I hope this helps, Jeff.
Posted on Jun 21, 2009
The radiator fan is not pulling enough check the belt tension.
make sure you have enough air cooling the condensor.
check the fan clutch make sure its not lame and loose.
if the radiator fans are electric make sure the fuses are good and make sure the fan motors are working and turning on with ac call.
Posted on Jun 20, 2009
I read your posts and keep getting "hung up" on that you say the compressor "seems" to be staying on...That's such a critical part of the problem that "seems" does not work for me. I've got a 97 sitting outside right now that is doing essentially the same thing...but the compressor is NOT staying engaged. (I know this because I looked at it.) However, there is 12v at the power lead to the compressor. One thing I noticed that disturbs me is that there is no independent ground wire and the clutch coil is separate from any other ground source. The ground wire is attached to the aluminum bracket, which being a dissimilar metal than the wire end, is prone to electrical corrosion. If it was not raining right now, I would already have cleaned that contact and/or connected it to a more reliable ground. What I believe is that since the clutch requires a large amount of amperage to stay engaged, it runs for a while then breaks contact. (as I said, if it were not raining, I'd have a definite "lock" on this as something more than an informed theory.)
Your problem could be also caused by a bad high or low pressure sensor, but you need to do some testing for verification.
Posted on Jun 18, 2009
The compressor will "cycle" on and off if the refrigerant level is getting low. There is a sensor that detects the pressure of the refrigerant on the "low" side. If there is enough pressure, the compressor can turn on. When the compressor pulls some of the refrigerant and compresses it to the "high" side, there will be less refrigerant for the low side, which causes the sensor to turn the compressor off again, then the refrigerant migrates back to the low side and the compressor can cycle back on.
Once the refrigerant level gets so low that the sensor won't allow it to turn on, you're done. You need to find the leak, repair it and recharge the system. Most AC systems that leak that fast have a worn seal and/or main shaft bearing in the compressor. You can't really repair a compressor so if that's your problem, just plan on getting a new one.
Look at the compressor, around the pulley. If you see oil, that's your leak.
Posted on Jun 19, 2009
Ok what your jeep is doing is there is something defective or broken with your AC unit that is why it shuts off. What you need to do is take it into a repair shop and get your AC replaced/repaired!
Posted on Jun 18, 2009
You need refilling the gas within the a/c system.I don't think there is anything else wrong here.They call it regasing..or somethiing like that..
Posted on Jun 17, 2009
Just need to clarify. You mean the AC remains engaged and you get cold air, when you have already switched off the AC?
Let me know i got you correct?
Waiting for your reply.
Posted on Jun 17, 2009
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Posted on Jan 02, 2017
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