Auxiliary Medium Blower Speeds

When the Medium 1(3) blower speed is selected, the auxiliary HVAC control module (IPM) applies a ground for the auxiliary blower motor. Voltage is routed from the auxiliary blower motor, through the high blower motor control circuit, through 2 series resistors in the auxiliary blower motor resistor assembly, to achieve the desired auxiliary blower speed. The circuit is grounded by the medium 1 blower motor control circuit and auxiliary HVAC control assembly.

When the Medium 2 (4) blower speed is selected, the auxiliary IPM applies a ground for the auxiliary blower motor. Voltage is routed from the auxiliary blower motor, through the high blower motor control circuit, through a resistor in the auxiliary blower motor resistor assembly, to achieve the desired auxiliary blower speed. The circuit is grounded by the medium 2 blower motor control circuit and auxiliary HVAC control assembly.