Mechanics

MERCURY SABLE EXPANSION VALVE PROBLEM

1999 Mercury Sable

Hi the air conditioning on this car has a problem. The low side gage reads 25-30 and the high side reads 250-350 on a cool day. The compressor cycles on and off at and idel. The low side sucks down to 20 psi and the low presure switch shuts it off. The high side jumps up from 250 to 340 or so during this time. The low side lines are frosting up like it is low on freon. I think it is a stuck expansion valve but I want to make sure. ThanksRuss
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Russell17
July 5, 2007.




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