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The Goodman 0130M00075 is a genuine OEM low-pressure (loss-of-charge) switch engineered as a direct fit for the WPH4360AHBB package heat pump and compatible Goodman/Amana units. Mounted on the low side of the refrigerant circuit, it opens the control circuit when suction pressure drops below its setpoint — protecting the compressor from running on a low or lost refrigerant charge. A failed switch is a common cause of a compressor that won't start or that short-cycles on a call for cooling.
This is a genuine Goodman OEM switch, calibrated to the exact factory pressure setpoint for your unit. Aftermarket generic switches often trip at the wrong pressure, causing nuisance lockouts or leaving the compressor unprotected. For a safety control, OEM calibration is worth the small price difference.
Moderate — depending on mounting it may require accessing a factory Schrader port. Should be installed by an EPA-certified HVAC technician. Always disconnect power before service.