Air Speed: Notes

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The blower motor forces air to circulate within the vehicles interior. The vehicle operator determines the blower motors speed by placing the blower motor switch in a desired speed position or by selecting automatic operation. In manual operation, once a blower speed is selected, the blower speed remains constant until a new speed is selected. In automatic operation, the HVAC control module will determine what blower speed is necessary in order to achieve or maintain a desired temperature. When the HVAC control module blower switch is set to the maximum manual speed position and the Mode Switch is set to PANEL or AUTO. The Blower Motor operates at 79.71% of the Blower Motor's maximum output. This is normal operation. When the HVAC control module blower switch is set to the maximum manual speed position and the Mode Switch is set to a position other than PANEL or AUTO. The Blower Motor operates at 100% of the Blower Motor's maximum output. If an On Star call is initiated while the blower is in high speed during automatic operation, the blower speed will be lowered to reduce background noise.