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

3,470

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
    5,910
  • #2
    kbro
    Reputation
    2,210
  • #3
    Js08016
    Reputation
    1,980
View All

Related Models For Sale

Used Lincoln Town Car
25 Great Deals out of 1,601 listings starting at $1,200
Used Ford Crown Victoria
4 Great Deals out of 874 listings starting at $2,000
Used Chevrolet Impala
506 Great Deals out of 32,205 listings starting at $1,000
Used Ford F-150
2,997 Great Deals out of 230,656 listings starting at $1,300
Used Mercury Marauder
27 listings
Used Chevrolet Tahoe
810 Great Deals out of 40,292 listings starting at $1,900
Used Ford Mustang
344 Great Deals out of 41,949 listings starting at $1,488
Used Ford Taurus
181 Great Deals out of 16,161 listings starting at $1,900
Used Honda Accord
797 Great Deals out of 89,039 listings starting at $1,444
Used Chevrolet Silverado 1500
2,665 Great Deals out of 157,830 listings starting at $1,850

Used Cars For Sale

2008 Mercury Grand Marquis GS For Sale
39 listings starting at $3,490
2007 Mercury Grand Marquis GS For Sale
33 listings starting at $2,495

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.