Mechanics

92 GRAND HEATER

1992 Mercury Marquis • V8 Automatic • 132,000 miles

1992 mercury grand marquis v8 when I turn the heater on the car dies cranks right back up and runs fine as long as the heater is off just changed spark plugs and wires the heater was working fine before checked all the fuses and for loose wires checked the battery cables all fine
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Lilkerry8
November 29, 2010.



Sounds like your A/C compressor may be locked up. You wouldn't expect it, but it engages in many of the heat modes also to remove moisture.

Wrenchtech
Nov 29, 2010.