1991 Mercury Grand Marquis Heater A/C only delivers super hot air no setting alters this except OFF


Asked by May 22, 2017 at 01:53 PM about the 1991 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

my 1991 Mercury Grand Marquis has the Automatic temp control ... recently the
heater a/c only delivers super hot air to cabin..no setting on control changes
this except OFF.... repair suggestions?  

2 Answers


More Info: controls do change air flow to defrost/floor/dash etc. Fan speed can be changed. AC settings with coldest temp still delivers super hot air, however to dash vents.

1 of 1 people found this helpful.

Actuator door may not be working properly. It controls whether heat or cooling comes into the vehicle.

1 of 1 people found this helpful.

Your Answer

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
  • #2
  • #3
View All

Related Models For Sale

Used Lincoln Town Car
24 listings starting at $1,850
Used Ford F-150
533 Great Deals out of 10,128 listings starting at $1,800
Used Ford Mustang
11 Great Deals out of 1,036 listings starting at $3,500
Used Lincoln Continental
58 listings starting at $54,900
Used Ford Taurus
18 Great Deals out of 325 listings starting at $2,100
Used Buick LeSabre
13 listings starting at $4,395

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.