One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Cadillac Seville
Average mileage: 110,200 (71,000–178,000)
24 people reported this problem
1991 Cadillac Seville 112,000 mi, Visitor
AC blows out heater and defroster vents and NOT out the dash vents where it is supposed to come out. It's not fixed yet but it seems to be a control or lack of control problem as in actuators failing or something like that.
Both air blending actuators (driver's side and passenger's side) are working fine. Rear mode actuator (on drivers side center console) is also working fine. These are all easy to get to. The front Mode actuator is not functioning. I want to R&R it. How can I get it out? I suspect I need to remove the Climate control / radio unit. How is this done?
were here inwisconsin can't get heater to work fan blows repaced thermostat still no heat??????
1997 Cadillac Seville 178,000 mi, Visitor
air and heat system stoped working, works under the hood but not blowing in car