HVAC System - Manual

VT A/C Compressor Components:

V7 A/C Compressor Components

The air conditioning compressor is driven by a belt from the engine crankshaft through the compressor clutch pulley. The compressor pulley rotates freely, without turning the compressor shaft, until an electromagnetic clutch coil is energized. When voltage is applied to energize the clutch coil, the clutch plate and hub is drawn rearward toward the pulley. The magnetic force locks the clutch plate and pulley together as one unit in order to drive the compressor shaft.

A/C Condenser
The condenser is located in front of the radiator. The condenser is made up of coils, which carry the refrigerant and cooling fins used to provide rapid transfer of heat. The air passing through the condenser cools the high pressure refrigerant vapor, causing it to condense into a high pressure liquid.

Engine Electric Cooling Fans
Engine cooling fan operation is crucial to the proper operation of the air conditioning system. The cooling fans ensure the proper amount of air flow across the condenser throughout the vehicle operating range.

Fan operation should be checked during any air conditioning diagnosis procedure. Special attention should be given to the fan whenever excessive high side pressures are encountered.