Auxiliary Blower Speeds

Power is provided to the A/C auxiliary blower motor switch by the auxiliary HVAC switch supply voltage circuit. The ground circuit and A/C auxiliary blower motor provides a path to ground.

When the OFF temperature setting is selected, the auxiliary air temperature switch creates an open circuit within the A/C auxiliary blower motor switch. This prevents any output being provided to the A/C auxiliary blower motor. When the Low, Med, or High temperature setting is selected, the A/C auxiliary blower motor switch applies a voltage to the A/C blower motor. Each Low, Med, or High temperature setting causes a corresponding Low, Med, or High blower motor setting to be selected. The auxiliary A/C system gets all of its cool A/C air from floor dueling that is connected to the IP ductwork. The A/C auxiliary blower motor switch controls the rate that cool air is emitted from the auxiliary A/C duct.