In article , rgh1016
>> Stay informed about: 2000 Gran Prix Climate Control
> My vehicle has a dual control climate control system and the conditioned air
> that is emitted from the driver's vents is substantially warmer than that
> out of the passenger vents when both controls are set for the same
> temperature in dual mode or when set by the driver's control in non-dual
> The air-mix control door motor on the driver's side appears to be rotating
> through it's full range as the temperature setting is moved from the low to
> the high extreme positions. (This being observed by watching the rotation of
> the motor shaft moving between the two extreme index markings)
> Does this system use two expansion valves whereby the two separate
> evaporators may be operating at different temperatures?
> The system worked properly prior to a failure of the a/c compressor but has
> displayed the problem described above ever since the new compressor unit was
> installed. I have also noticed the outside temperature indicator
> intermittently shows a much lower reading than the real outside temperature.
> However, the problem described above exists when the outside temp reading is
> at/near the correct outside temperature.
> Any suggestions you have on isolating this problem will be greatly
> Ray Hardy
No. It just blends air from the heater core and the evap in the air box
for one side or the other.
The temp blend doors are controled by solid state motors which from what
I recall are attatched to the doors with bent threaded rods with plastic
threaded connectors. Its possible one slipped or stripped and isnt
pushing the door all the way.
They may have damaged the wire for the outside temp sensor when
installing the compressor. Its located near the air damn usually.