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A/C Question - Frosting & Sweating 900 1995

uid 5325's pic
posted by  cb78 on  Mon Jun 24 17:13 CST 2002
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last visit: Wed Jun 24 06:50 CST 2009
[RELATED]

Any advise is greatly appreciated.

My 95 940 A/C is not blowing as cold as last year. I have thoroughtly checked the FAQs and archives but still cannot narrow it down. Condensor was recently cleaned, rad fan runs once the A/C button is pressed and runs continually when A/C is one and the interior heater fan works fine also.

I checked all the lines and there are no oil stains (so no o-ring leaks hopefully). Compressor cycles for about 5 seconds at 2000rpm, but runs continually while idling. I did notice that the short (& larger diameter) line that goes into the accumulator (suction line?) had frosted over and the accumulator and other lines were sweating quite a bit - they were actually dripping like crazy.

Oddly enough even though pipes were sweating, there was no drpping from the drain hole in the fire wall. Checked with a piece of wire a does not seem to be blocked. Outside temp was about 70-75.


The Chilton manual is useless for A/C, but my Hanes manual (for my Nissan truck) mentions something about an expansion valve being stuck open??? Does this apply to my 940?

Since A/C repairs are outside of my ability, I would like to make sure that I am well informed before I go to the A/C shop.

Am I low on R-134 or is it some other potential problem?

Thanks

Chris

95 940 42K miles





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