Does the PCM have anything to do with the Air Conditioning functions?

Asked by Jul 27, 2017 at 03:57 PM about the 2003 Mercury Grand Marquis GS

Question type: Maintenance & Repair

We turned in our Grand Marquis for the Light Switch recall and noted to the service people that the AC compressor is slow to kick on but once it does, it works fine. They are now tewlli8ng us that it is the Powertrain Control Module. Does it have any function with respect to the AC?

1 Answer

3,890

It can but I would check many other things before going straight to a costly repair like the computer. Get a second opinion. It could be several cheaper fixes. Check system pressures, low pressure switch, Compressor relay, weak clutch on compressor, does it go hot when you are idling at a stop light? Condenser could be issue. I would not tell second shop that you went to the first or what you suspect.

Your Answer:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    6,070
  • #2
    kbro
    Reputation
    2,240
  • #3
    Js08016
    Reputation
    2,160
View All

Related Models For Sale

Used Lincoln Town Car
29 Great Deals out of 1,464 listings starting at $899
Used Ford Crown Victoria
5 Great Deals out of 751 listings starting at $2,995
Used Chevrolet Impala
518 Great Deals out of 26,213 listings starting at $995
Used Mercury Marauder
24 listings
Used Ford F-150
2,357 Great Deals out of 199,530 listings starting at $1,300
Used Ford Mustang
303 Great Deals out of 40,193 listings starting at $1,312
Used Ford Taurus
208 Great Deals out of 16,267 listings starting at $600
Used Chevrolet Silverado 1500
1,860 Great Deals out of 158,323 listings starting at $1,000
Used Chevrolet Tahoe
674 Great Deals out of 38,545 listings starting at $995
Used Toyota Camry
863 Great Deals out of 71,819 listings starting at $1,300
Used Cadillac DeVille
1,282 listings starting at $999

Used Cars For Sale

2008 Mercury Grand Marquis GS For Sale
34 listings starting at $1,700
2007 Mercury Grand Marquis GS For Sale
30 listings starting at $1,196

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.