Information

Important:
Before performing the procedures in this bulletin, inspect, clean, and/or replace the passenger compartment air filter to ensure odor is not caused by debris in the filter. Refer to the appropriate section in the HVAC Service Manual for Removal and Installation procedures as needed.

Important:
Before installing the delayed blower motor control module (for manual HVAC systems, RPO C60) or activating the delayed blower motor control (for automatic climate control systems, RPO C68), the following information MUST BE EXPLAINED TO CUSTOMER.

CUSTOMER INFORMATION

^ The delayed blower motor control module will not affect normal A/C or blower motor operation. However, the delayed blower motor control module will activate the blower motor on high speed for approximately five minutes, if the A/C clutch has been continuously activated for 4 minutes or more. The delayed blower motor control module will wait approximately 50 minutes after the ignition is turned OFF before activating the blower motor.

It is during the blower run time that condensation which causes microbial growth is removed from the evaporator core. The blower motor will be turned ON with no driver input when the ignition is turned off and the conditions as stated above are met. The air rush sound created by the blower motor is noticeable from outside the vehicle.

^ The minimal current draw of the delayed blower motor control module, combined with the blower motor load, will lower the state of charge of the vehicle's battery, and may negatively impact battery life depending on the driving habits of the customer.