on my '91 Park Avenue the climate control suddenly can not be switched
to "Auto" anymore but stays on or goes to "Econ" instead if I press the
"Auto" button - meaning that I cannot cool the car anymore.
All other functions of the dashboard control unit seem to work.
Does this mean that probably the dashboard control unit is defective?
Does anybody know how to replace this control unit? It seems to be fixed
with 3 screws (2 at the sides, 1 at the top), but how to remove the long
black dashboard covering?
I would be very grateful if some of you could give me some hints.
Thanks a lot
This happens as a default, the a/c circuit is a problem, usually a loss of
freon prevents the compressor from coming on, and it defaults to econ. Have
the compressor looked at, I believe you will see it does not engage.
If the compressor doesn't come on , jump the high press switch and see if
does, actually there may be 2 switches low press also, not sure. This should
turn on the compressor, if the relay is ok, you really should have an
operation diagram here, this can get complicated. When it comes on see if
the LP pipe gets cold, the larger of the two, this will confirm there is
some freon in the system.
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