2. Thermo Control Amplifier

2. THERMO CONTROL AMPLIFIER
The thermo control amplifier disconnects the magnet clutch circuit to prevent the evaporator from becoming frosted when the temperature of the evaporator discharge air drops close to "3°C (37°F)". As the evaporator is cooled, the thermistor (located on the evaporator fin) interrupts the "base" current of the amplifier This in turn deenergizes the A/C relay coil, which in turn disconnects the magnet clutch circuit.