Posts Tagged: How To Diagnose a Variable Displacement AC Compressor

How To Diagnose a Variable Displacement AC Compressor

How I Diagnose a Variable Displacement AC Compressor Like a Pro If you’re diagnosing the AC system on a late-model vehicle, you need to understand how compressor technology has evolved. Most newer vehicles now use a direct-drive variable displacement AC compressor, not the old-school, clutch-cycled type your grandfather dealt with. In these systems, the pulley on a direct-drive compressor spins continuously, and the compressor adjusts refrigerant flow internally based on demand. That’s a major shift from older compressors that simply turned on and off. Because these systems operate so differently, … Read More