Cadillac: heater, flow control valve, cool air

Question
car: 91 cad fleetwood 4.9 FWD
is there a heater control vale in this car.
also will the heater work if the A/C compressor does not.
i get heat out of rigth side @cool air out the left in both DEF@heat mode.

Answer
Please translate your statement being: "i get heat out of rigth side @cool air out the left in both DEF@heat mode.

Yes the heat will work IF the A/C does not.

What recent work of anykind has been done to the vehicle ?.

NO, There is NO flow control valve on the vehicle.

There is a damper door control module that commonly fails.


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