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Home >> Plymouth >> 1978 >> Arrow Base, Automatic Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Auto. A/C Systems >> System Components >> Amplifier

System Components: Amplifier

Located on right end of evaporator assembly. It converts signals from sensors and temperature lever into a single signal to servo assembly. Amplifier signal to servo positions servo and feedback potentiometer, which creates a return signal. This return signal shuts amplifier off until it is needed again. Amplifier also uses a battery voltage signal to "PARK" the system (low blower and A/C mode) whenever "OFF" pushbutton is depressed end/or ignition switch is off.