K Tahoe 4WD V8-4.8L VIN V (2000)
Cold Purge Mode
In the cold weather, the moist breath air from the vehicle occupants may condense on the windshield. On cold startup, the ECC module checks for
indications that this condition may occur. If this condition occurs, the ECC module performs the following actions:
-
Positions the doors in order to direct air out of the windshield outlets
-
Operates the blower
The ECC module then resumes normal system operation.
A/C Purge Mode
Moisture tends to accumulate in the ECC module assembly after the engine has been turned off. When the engine is restarted and the A/C system turns
ON, this moisture may be expelled from the panel outlets toward the front seat occupants.
During startup, the heater and ECC module inspects for indications that this condition may occur. If this condition occurs, the ECC module performs
the following actions:
-
Positions the A/C door in order to direct air toward the floor
-
Operates the blower
The ECC module then resumes normal system operation.
