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Jeep Liberty Heating Ventilation and A/C

48 messages,  Last post on Jul 29, 2009 at 8:43 AM

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#37 of 48 2003 Liberty Sport by jrivera51 Feb 10, 2009 (6:19 am)
I love my Jeep Liberty but it has now about 93,000 miles and starting to give all kinds of problems. The A/C works fine for a while then it stops and starts blowing hot air. It would go away if you turn it off for a while and then back on. Also, the engine light is on and the mechanic (a good one) could not figure out why.
#38 of 48 Water out of tube on passenger side of firewall - Jeep Liberty 2005 by dasbooboo Mar 27, 2009 (10:58 am)
2005 Jeep Liberty... I have water dripping out but not running A/C. Any idea what this is? I am novice of auto repair but believe the is the AC over flow/runoff. Again, not running AC though... any ideas will help before I head for repair shop. Thanks!
#39 of 48 2003 Jeep Liberty A/C by lj1sb May 13, 2009 (5:31 pm)
Hi. Here is a quick rundown before I get into my issue. This is a 2003 Jeep Liberty, A/C compressor went (the clutch froze up) broke the belt, etc. had it replaced by a local service place. A/C, however, is not working. The compressor clutch does not seem to be engaging. If I throw 12v directly to the compressor, it will engage the clutch. If I throw 12v to the relay at the fuse/relay box under the hood, it will engage the clutch. I tried pulling the low-pressure sensor plug at the can by the passenger firewall, jumping wires together, nothing. Also just replaced the high-pressure sensor (on the a/c line by the compressor), still nothing. Fuses are good, relay in underhood fuse box is good. What i did notice it the blower resistor (behind the glovebox) is probably bad (position 1 & 2, blower does not come on, position 3&4 blower does come on). If the blower motor resistor is bad, will that cause the a/c compressor clutch to not not engage properly? Shouldnt the a/c still work in Positioin 3&4, since the blower is kicking on?   Also like to add, I had a guy I know hook it up to DRB-3 at a Jeep dealer and there are no codes to troubleshoot with.   Any help is appreciated. Thanks Replies to this message: caribou1 (May 14, 2009 1:25 am) lj1sb (May 14, 2009 5:08 am) caribou1 (May 14, 2009 6:42 am)
#40 of 48 Re: 2003 Jeep Liberty A/C [lj1sb] by caribou1 May 14, 2009 (1:25 am)
Replying to: lj1sb (May 13, 2009 5:31 pm) Hi, When the engine is warm, running and belt is in place: -If you set the blower to position '3', does the A/C come on?   With a 'warm' engine stopped and serpentine belt removed: -Can you turn the compressor by hand if you activate the clutch with jumpers?   To 'break the belt' or 'freeze the clutch' could mean there was excessive effort coming from the compressor: -Is the cabin evaporator/heat_exchanger clean? (it could be clogged). If the compressor sees liquid instead of gas it will block and the pulley will immediately throw the belt off it's normal path because the clutch won't let go until the temperature setpoint has not been achieved.   There should not be any engine malfunction code in case an accessory fails and the clutch is part of the compressor, it is not related to the engine. Good luck   - Replies to this message: lj1sb (May 14, 2009 5:08 am) caribou1 (May 14, 2009 6:42 am)
#41 of 48 Re: 2003 Jeep Liberty A/C [caribou1] by lj1sb May 14, 2009 (5:08 am)
Replying to: caribou1 (May 14, 2009 1:25 am) A/C Compressor will not come on in ANY position. Blower only comes on in Position 3&4. Does not matter if the engine is warm or not...won't come on. As mentioned, I can maniulpulate the compresor clutch to engage and a/c to come on if I throw 12v straight to the compressor or compressor relay. As mentioned, the A/C compressor was just replaced.   What is the cabin evaporator/heat exchanger? Where is it located? And can I do a visual inspection or test on it to determine if it is the culprit?   What about my other question...the blower resistor appears to be faulty as the blower only comes on in Position 3&4....will this also prevent tthe A/C from coming on, even in Position 3&4? Replies to this message: caribou1 (May 14, 2009 6:42 am)
#42 of 48 Re: 2003 Jeep Liberty A/C [lj1sb] by caribou1 May 14, 2009 (6:42 am)
Replying to: lj1sb (May 14, 2009 5:08 am) Can you manually turn the rotor of the compressor while you force the clutch?   The evaporator is the heat exchanger that cools air in the cabin. On mine it's above the passenger's feet, just behind our miniature glove box   If you have pollen or leaves accumulated against the evaporator, there might not be enough air flowing through to evaporate all of the A/C liquid. This could be enough to block the compressor because you can compress gas but not liquid.   Our A/C compressor pumps gas, then gas becomes liquid while flowing through the condenser/chiller located in front of the radiator. This liquefied gas will later evaporate when confronted to the warmer cabin temperature; at this stage ONLY gas must return to the compressor for another cycle...   I don't think of any relation between the resistor positions and the A/C?
#43 of 48 Re: Phantom water leak 2006 Liberty [waNugget] by fishinsteve Jun 07, 2009 (10:35 am)
Replying to: waNugget (Jan 06, 2009 9:32 pm) I have a 2002 liberty and had a similar problem. No sunroof. Turns out my water leak came from the drain holes at bottom of vehicle which are hidden from view were clogged. There are drain holes at bottom which allow the water coming down window track and door seals to drain out and they sometimes will clog and the water will then find its way into car thru any hole it can, usually down by foot where hood latch release is. If you pull the plastic molding by hood release off and you will see a small 1/2 inch long slit by some bolts. My mechanic stuck a clothes hanger wire in there and poked around until he found the hole at bottom and lots of water came rushing out underneath car. Problem solved. He was not sure how else to clear the clogged drain holes, just did what he could to figure it out. Hope this helps. Replies to this message: caribou1 (Jul 08, 2009 11:51 pm)
#44 of 48 Re: Phantom water leak 2006 Liberty [fishinsteve] by caribou1 Jul 08, 2009 (11:51 pm)
Replying to: fishinsteve (Jun 07, 2009 10:35 am) Hi fishinsteve, I don't understand where the clogged drain is located.   I found lots of dirt accumulated between the decorative plastic liners and the body, right underneath the doors. This is where bottom panels join the chassis. To remove the residue where perforation can occur, we need to replace the 'one-shot' plastic fasteners or to paint this 'vertical' area in black.
#45 of 48 2005 Liberty with fan problem by 05jeep92102 Jul 15, 2009 (2:38 pm)
This is the weirdest thing I was at a car wash & when I dropped off my car all the fan speeds worked with or without the AC on. I get in my car and #2 does not work at all, but 1, 3 & 4 are okay with or without the AC.. Has anyone had this same problem? Its still under the factory warranty until 100,000 miles and I only have 55K, Im wondering if this will be covered? II guess I could live without #2, but #3 is so loud, is this a big deal?
#46 of 48 a/c works, then not by rciminelli Jul 25, 2009 (8:21 am)
2006 liberty diesel. some mornings the a/c gets cold within seconds. later in the day it stops working cold and blows warm air. other mornings it blows warm when started and will not get cold. it's iratic, cold, not cold.i'm headed to fl withing weeks and need help.

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