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The Goodman 0130M00074 is a genuine OEM high pressure cut-off switch designed for the WGPH4543AMAB packaged unit and related Goodman/Amana systems. This normally-closed safety control opens the circuit when refrigerant discharge pressure climbs to an unsafe level, shutting down the compressor to prevent catastrophic damage from a blocked condenser, failed fan, or overcharge condition.
Pressure switches are calibrated safety devices — the cut-out and cut-in setpoints must match your system exactly. This OEM switch is factory-set to Goodman's specification for the WGPH series. Generic switches with the wrong trip points can either nuisance-trip in hot weather or, worse, fail to protect the compressor. For a safety control, OEM is the right call.
Easy to Moderate — a technician-level repair because it requires opening the sealed refrigerant circuit. Recover refrigerant before removing the switch, install with a new seal, evacuate, and recharge to nameplate. If your switch threads onto a Schrader-style port, replacement is simpler. Always confirm the fault that caused the trip before replacing the switch.
Genuine Goodman protection, shipped fast from National HVAC Parts.