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Jeep Liberty Heating Ventilation and A/C

85 messages,  Last post on May 31, 2013 at 9:53 AM

You are in the Jeep Liberty and Jeep Liberty Diesel Forum.

What is this discussion about? Jeep Liberty, Auto Repair, SUV

Messages Page 5 of 9

#39 of 85 2003 Jeep Liberty A/C by lj1sb

May 13, 2009 (6:31 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

#40 of 85 Re: 2003 Jeep Liberty A/C [lj1sb] by caribou1

May 14, 2009 (2:25 am)

Replying to: lj1sb (May 13, 2009 6:31 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
 
-

#41 of 85 Re: 2003 Jeep Liberty A/C [caribou1] by lj1sb

May 14, 2009 (6:08 am)

Replying to: caribou1 (May 14, 2009 2:25 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?

#42 of 85 Re: 2003 Jeep Liberty A/C [lj1sb] by caribou1

May 14, 2009 (7:42 am)

Replying to: lj1sb (May 14, 2009 6:08 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 85 Re: Phantom water leak 2006 Liberty [waNugget] by fishinsteve

Jun 07, 2009 (11:35 am)

Replying to: waNugget (Jan 06, 2009 10:32 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.

#44 of 85 Re: Phantom water leak 2006 Liberty [fishinsteve] by caribou1

Jul 09, 2009 (12:51 am)

Replying to: fishinsteve (Jun 07, 2009 11:35 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 85 2005 Liberty with fan problem by 05jeep92102

Jul 15, 2009 (3:38 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 85 a/c works, then not by rciminelli

Jul 25, 2009 (9:21 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.

#47 of 85 Re: Phantom water leak 2006 Liberty [waNugget] by fideau

Jul 26, 2009 (5:54 pm)

Replying to: waNugget (Jan 06, 2009 10:32 pm)
Had same problem with 02 Liberty. The AC drain is too short and gets easily clogged. Even wind will drive water back into the cab as you drive. Its on the firewall, passenger side.After several "clean outs" a mechanic at my dealership took a piece of hose and lengthend the drain, turned it down a little. Only about 5 inches of hose. Problem solved. It's just one more of those bad engineering problems on the Liberty.

#48 of 85 a/c works, then not by rciminelli

Jul 29, 2009 (9:43 am)

Problem solved. It turns out that the sensor on the receiver/dryer went bad. when the plug was disconnected and the plug terminals jumped, the compressor started immediately. they do go bad.

Messages Page 5 of 9

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