will not switch from heat to ac

Asked by Sep 15, 2014 at 03:14 PM about the 2002 Mercury Grand Marquis GS

Question type: Maintenance & Repair

blower works find will not switch from heat to AC

1 Answer

1,205

Does the compressor clutch engage? Most likely, you have a leak and are out of refrigerant. Possibly a bad pressure cut off switch.(easily visible with 2 wires plugged into it. The controls on a GS are a lot simpler than the LS, but I doubt if that's it.

Your Answer

Add photo

Related Questions

  • ac runs and so does heat at same time no ac in car 1 answer

    ac runs and heater will not shut off

    1998 Mercury Grand Marquis 4 Dr GS Sedan

    -

    Maintenance & Repair

  • Vacuum noise when turning car AC on. 5 answers

    My car AC works fine but ive noticed when the AC is turned on I hear a steady vacuum noise that comes on. Its pretty noticeable and fairly loud. When I turn the ac off I still hear the noise until I...

    2007 Mercury Grand Marquis LS Premium

    -

    Maintenance & Repair

  • why wont my fan come on 6 answers

    i replaced my ac blower resistor and my fan still will not come on so my heat and ac can work

    2000 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • how to fix ac 2 answers

    the freon was low filled it up. the car has not ran hot at all. when I click the ac button to turn on the air or heat you can hear it click on but no fan noise or air blowing. what can i do to fix thi...

    2000 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • AC stays on even in the heat position 2 answers

    2003 Mercury Sable GS

    -

    Maintenance & Repair

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,260
#2 kbro
kbro
Reputation 2,050
#3 Js08016
Js08016
Reputation 1,660
View All

Related Models For Sale

Used Ford Crown Victoria
10 Great Deals out of 985 listings starting at $2,990
Used Lincoln Town Car
26 Great Deals out of 1,828 listings starting at $1,695
Used Chevrolet Impala
596 Great Deals out of 29,281 listings starting at $1,300
Used Mercury Marauder
29 listings starting at $10,000
Used Ford Taurus
192 Great Deals out of 19,381 listings starting at $500
Used Chevrolet Tahoe
630 Great Deals out of 27,876 listings starting at $600
Used Cadillac DeVille
7 Great Deals out of 1,614 listings starting at $2,000
Used Honda Accord
716 Great Deals out of 82,625 listings starting at $500
Used Ford F-150
2,421 Great Deals out of 210,756 listings starting at $895
Used Ford Mustang
313 Great Deals out of 45,688 listings starting at $2,000

Used Cars For Sale

2008 Mercury Grand Marquis GS For Sale
46 listings starting at $3,995
2007 Mercury Grand Marquis GS For Sale
46 listings starting at $3,699