Posts Tagged: HVAC automotive

How a Variable Displacement AC Compressor Works

How to Diagnose Variable Displacement Compressor Issues Quick Summary A variable displacement AC compressor adjusts its output based on cooling demand—it doesn’t just turn on and off like clutch-type AC compressors. • A variable displacement compressor changes piston stroke using a swash plate angle instead of cycling like older systems • A compressor control valve is the key component that regulates output and varies the swash plate and piston stroke. • These compressors run continuously but can “de-stroke” to near zero output (free-wheeling). • Most failures I diagnose involve the … Read More