buick Workshop Repair Guides

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Compressor Clutch Relay: Description and Operation

The ECM controls the A/C compressor clutch relay. When the A/C is turned on, the ECM delays the clutch engagement of the A/C compressor to allow
the IAC valve to raise the engine idle speed to compensate for the added load. The ECM also causes the relay to disengage the A/C clutch at wide open
throttle and during high pressure power steering pump loads.

Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Description and Operation

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