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The Goodman 0130M00074 High Pressure Cut-Off Switch is a genuine OEM safety control for WPH4360AHBB packaged heat pumps. Wired into the compressor control circuit and mounted on the high (discharge) side, it opens to shut the compressor down when head pressure spikes—protecting against a dirty condenser coil, failed fan, or overcharge. It's an auto-reset control that re-closes once pressure drops back to a safe level.
The OEM 0130M00074 is calibrated to the exact trip/reset set points this system was designed for. A generic switch with different set points can nuisance-trip in cooling or, worse, fail to open in time and let the compressor run into a dangerous overpressure. When the part is a safety device guarding the compressor, use the OEM calibration.
The switch typically threads onto a Schrader-style port or clamps to the line and connects via two spade terminals. On a Schrader fitting, the valve reseals as you remove the switch, so little to no refrigerant is lost. Cut power first and confirm the terminal wiring. On brazed-in versions, refrigerant recovery is required—verify your connection type before ordering service.