Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Chevrolet 1500 Pickup

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.

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Average mileage: 203,130 (80,000–333,333)
7 model years affected: 1992, 1994, 1995, 1996, more1997, 1998, 1999
18 people reported this problem
11 people shared problem details
I only get heat, even though the a/c is working properly. Fan is good. Someone has said the door is stuck in the heat position. Where is it located and the best way to fix it is how?
7 people like thisFlag inappropiate
air will not completely quit blowing from defrost vent
4 people like thisFlag inappropiate
When blower motor is on 2 highest settings,air can be heard roaring in the vent system but the proper amount of air volume coming from vents is not as when newer.Took door actuator off and seems to be working fine off of unit. Will explore the possibility of mode actuator being stuck or bad.The search for this problem continues.Post 5/26/2011.
3 people like thisFlag inappropiate
Sometimes when driving down the road and I let down my window and then AC quits blowing out cold air; however, very hot air begins blowing out from underneath the steering wheel. When I let up the window the AC just blows out warm air out the vent and the hot air quits blowing out from under the steering wheel. It takes a days and/or months to blow out cold air again. I have not found a fix for this yet. I have just started reseacrhing the problem.
2 people like thisFlag inappropiate
No heat! replaced blend door actuator
1 person likes thisFlag inappropiate
only blowing luke warm air on high heat not fixed yet
1 person likes thisFlag inappropiate
replace actuator
1 person likes thisFlag inappropiate
A.c. doesn't blow completely cold also doesn't have the velocity it used to have. Replaced compressor, hoses and condenser with no change.
darryl wingfield735
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