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The Goodman 0130M00074 High Pressure Cut-Off Switch is the genuine OEM refrigerant safety control for the Goodman WGPH4524AMAB packaged heat pump and compatible models. This normally-closed switch monitors discharge-line pressure and opens the control circuit if pressure climbs to an unsafe level — protecting the compressor from damage caused by a dirty condenser coil, blocked airflow, or an overcharged system. When this switch trips repeatedly or fails open, the unit will lock out or refuse to run, and a fresh OEM switch is the correct fix.
The OEM Goodman switch is calibrated to the exact trip and reset pressures specified for your system, with a factory-matched fitting and connector. A generic switch may use approximate setpoints that nuisance-trip or, worse, allow pressures the compressor shouldn't see. For a safety device, OEM calibration is worth it.
Easy to Moderate — Recover or pump down as required, disconnect power, unscrew or unsolder the old switch, install the replacement, and verify the connection. Refrigerant-side work should be performed by an EPA-certified technician.