Impreza Coupe FWD F4-1820cc 1.8L SOHC (1995)
The thermo control amplifier disconnects the magnet clutch circuit to prevent the evaporator from becoming frosted when the temperature of the
evaporator fin drops close to "2°C (36°F)". As the evaporator is cooled, the thermistor (located on the evaporator fin) interrupts the "base" current of
the amplifier. This in turn de-energizes the A/C relay coil, which in turn disconnects the magnet clutch circuit.
Acceleration Cut System
The A/C switch turns the A/C system on or off. The on-off operation of the switch is transmitted to the ECU.
The A/C cut relay breaks the current flow to the compressor, through the use of an output signal from the ECU, for a certain period of time when a
"full-throttle" signal (emitted from the throttle sensor) enters the ECU while the compressor is operating. This prevents the degradation of acceleration
performance and stabilizes the main fuse box located on the leff side of the engine compartment.
