1991 Mercury Grand Marquis Heater A/C only delivers super hot air no setting alters this except OFF
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?
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.
Actuator door may not be working properly. It controls whether heat or cooling comes into the vehicle.
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