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Home >> Mercury >> 1999 >> Tracer Trio >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System >> Operation >> System Controls >> Function Selector

Function Selector

Function selector rotary switch, located on integrated control panel, controls air distribution. See Figure . The function selector operates vacuum motors which position airflow control doors inside the heater assembly. The position of these doors determines to which outlets air will be delivered. Six positions are available: OFF, panel, panel/floor, floor, floor/defrost, and defrost.