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