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The Goodman 0130M00074 High Pressure Cut-Off Switch is a genuine OEM refrigerant safety control for Goodman WGPH4549AMAB packaged units. It monitors high-side system pressure and opens the control circuit to shut down the compressor if pressure climbs to an unsafe level — protecting the compressor and coil from damage caused by a dirty condenser, blocked airflow, or overcharge. A faulty switch can cause nuisance trips or fail to protect the system.
The OEM switch is calibrated to Goodman's exact trip and reset pressure setpoints. Generic switches with incorrect setpoints can trip too early, nuisance-locking the system, or too late, allowing damaging pressures. For a safety device, matching the factory calibration with the genuine OEM part is strongly recommended.
Moderate — most versions thread onto a Schrader-style port (no refrigerant recovery needed) plus two spade wires; sealed-system versions require an EPA-certified tech. Plan 20–40 minutes. Disconnect power before servicing and verify correct setpoint orientation.