I have had my 1994 940T for three years. I have never had the AC serviced as it has worked great until this year.
The cooling seemed to be operating intermittently and seems to have stopped now. The compressor won't start.
I have not put any guages on it yet, but if there is some refigerant left, but not enough to overcome the low pressure switch, is it acceptable to recharge with the compressor running or should I have the old refrigerant recovered, evacuate, and then refill with R-134a?
I have not noticed any oily residue around any of the external fittings, hoses, compressor, or condensor.
Thanks.
Greg Nottingham
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