Mercury Grand Marquis

1992 Grand Marquis The heater-ac used to blow but the ac was not charged so you charged it and on that same day it stopped blowing and makes this horrible growling humming grinding glug sound when?



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Sounds like too much has been freon added. have it checked when cold. Too much will ruin and/or lock your compressor. Your problem is possibly the Orifice valve. About $3-5/00, 100 Labor. David That was $3.00 to $5.00, and $100.00 Labor (and new freon. It should hols around 3 12 ox cans. If too much Stop Leak or Leak Detector has been added, you have probable stopped up the orifice. David