Automatic A/C

GENERAL DESCRIPTION




The heater and cooling units are combined in a single unit, reduces ventilation resistance, increases fan power, and decreases noise.

OPERATION

CONDENSER FAN AND RADIATOR FAN CONTROL
- For the operation of each fan, refer to Diagnosis - Symptom Chart in Engine cooling.

COMPRESSOR CONTROL

When operating the A/C switch
- The air thermo sensor, which senses the temperature of the air flowing out of the evaporator, deactivates the compressor at 5 degrees C (41.0 degrees F) or below.
- The dual pressure switch turns OFF when the refrigerant pressure becomes excessively high or low, thus protecting the compressor circuit (See Table).
- When the air thermo sensor is activated, and the ignition switch, blower switch, and A/C switch are ON, the A/C compressor clutch relay is energized.

When operating the mode selection dial
- The air conditioning will work when the mode selection dial is set to the "Defroster" or "Defroster/foot" position, or the temperature control dial is set to the "MAX A/C" position. In other dial positions, when the A/C switch is turned on, the air conditioning will work.




A/C Compressor Clutch Relay ON Conditions