Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
temp-door actuator. if it did go from 90 to 73 there is a chance you can have them run a re-calibration with a tech 2 at the dealer but in all likelihood it will need an actuator. do you have dual zone HVAC? if so see if one side is working properly so we know which actuator to look at.