Control Module HVAC: Description and Operation

Control System Automatic Amplifier (Auto Amp.):

The auto amplifier has a built-in microcomputer which processes information sent from various sensors needed for air conditioner operation. The air mix door motor, mode door motor, intake door motor, blower motor and compressor are then controlled.
The auto amplifier is unitized with control mechanisms. Signals from various switches and Potentio Temperature Control (PTC) are directly entered into auto amplifier.
Self-diagnostic functions are also built into the auto amplifier to provide quick check of malfunctions in the auto air conditioner system.