Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
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When the air temp is only correct on one side of the dash, this is more commonly due to a faulty Air Temp Actuator. This is a little servo that turns the door internal of the HVAC housing to switch between heat and A/C. On this vehicle, the passenger's side actuator is mounted to the side of the housing, behind the dash (for an image location view, click here: https://goo.gl/L636rE). Inspect the electrical connector and wire harness for any loose, broken or damaged wires. If the inspection checks ok, remove the actuator and turn the door by hand making sure there is no binding. If there are any problems here, the HVAC housing will need to be opened and the internal door repaired as needed. If this all checks ok, replace the actuator. Please remember to leave a rating using the 'stars' or click 'Accept'. A 5-star rating is very much appreciated! Rating or accepting my answer does not cost you extra.
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