OEM A/C Pressure Cycling Switch (3-Terminal)

❄️ COOLING CONTROL – FACTORY A/C PRESSURE CYCLING SWITCH FOR TURBO BUICK

This is a used OEM-style 3-terminal A/C pressure cycling switch removed from a 1986–1987 Buick Grand National. It mounts on the accumulator/drier and regulates compressor cycling by monitoring low-side refrigerant pressure. Critical for keeping your factory A/C system working properly and preventing evaporator freeze-up.

✅ Fits 1986–1987 Buick Grand National & Turbo Regal
✅ 3-terminal design – correct for GM G-body A/C systems
✅ Threads into stock accumulator/drier port
✅ Works with R12 or R134a systems (depending on retrofit)
✅ Regulates compressor engagement based on system pressure

🟡 Yellow Dot – Used. Threads intact, terminals clean, but not bench-tested.