1995 Chrysler Le Baron AC not working. Still!

WHITEPLUM

MEMBER
1995 CHRYSLER LE BARON

Air Conditioning problem
1995 Chrysler Le Baron Automatic 185000 miles

Ac went out. Local repair shop had me replace my blower motor, resistor, fuses and switch; and after all that -still NO AC. They said they dont know what else it could be and sent me on my way. Now im back to square one roasting to death in my car. Pleeeease help. What else is left for me to replace/check? I turn the AC switch on and theres no sound except for the defrost button -when pushed, makes a sound like air pressure being released, or gas escaping. Don't know what could be wrong and would appreciate any advice in helping me to diagnose the problem.

2 Replies

MERLIN2021

MECHANIC
17,250 POSTS

Is the problem the blower motor not working? If the switch hasnt been checked do that,here's the flowchart.

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Friday, June 12th, 2009 AT 4:16 PM

CARADIODOC

MECHANIC
33,916 POSTS

The hissing noise is the vacuum motors switching modes in the dash.

Is the compressor turning on? That's the first thing to check for. If it's not, the system is probably low on charge. At this age, it's likely there is no major leak, but the refrigerant has just seeped out over time.

If the compressor does turn on, there's a 1/4" diameter sight glass on top of the receiver / drier where you can look for vapor bubbles. If there are bubbles, the system is low on charge. A professional should recharge the system. Over-charging the system can lead to liquid refrigerant entering the compressor which is certain death for it. Compressors can only handle vapor. The only way to know the correct amount of refrigerant is in the system is t totally drain the system and put a measured amount back in. The professionals can also analyze system performance by reading the gauges on the high and low sides.

Caradiodoc

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Saturday, June 20th, 2009 AT 2:17 AM