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.Google+
Car Problem Reports
Cadillac Escalade Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail
Cadillac Escalade Problem
Average Mileage: 100,409 mi (55,000 mi - 137,000 mi)
Visitor, 2004 Cadillac Escalade, 98,000 mi
with a/c on it will switch to heating on drivers side only i have to stop, turn off and restart. may have to do 1 or 2 times
Visitor, 2003 Cadillac Escalade, 137,000 mi
must be set to 90 to get heat to the front. rear heat works at intervals of seldom to none
Visitor, 2004 Cadillac Escalade, 55,000 mi
Believe problem to be in the lower actuator. During AC season, passenger side upper and lower vents randomly blow extremely hot air - unbearable for the passenger. Drivers side and rear AC works fine when this happens. I have not found a solution yet other than the $1200 the dealer said would cost to fix.
Visitor, 2005 Cadillac Escalade, 81,500 mi
when ac on-- get heat on drivers side and cool on passger's side
Visitor, 2002 Cadillac Escalade, 128,958 mi
front & rear a/c blowing warm air clutch cycleing, short cycleing switch,add refrigerant, the only line that feels cold is the liquid line entering the evaporator and that is with the accumulator switch shorted.