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The genuine OEM Goodman 0130M00075 Low Pressure Switch is a factory refrigerant safety control designed for the Goodman APH1536M41AC packaged heat pump and compatible units. This normally-closed switch monitors low-side refrigerant pressure and opens the control circuit when pressure drops below its trip point — protecting the compressor from running under a lost-charge or low-charge condition. Installing the correct OEM switch keeps the unit's safety lockout logic working exactly as the factory intended.
An OEM Goodman switch is calibrated to the exact cut-out and cut-in pressures the control board expects, so nuisance trips and missed protection are avoided. Generic aftermarket switches may carry a lower sticker price but frequently use different pressure set-points and fittings, which can cause false lockouts or fail to protect the compressor. For a warranty-eligible, drop-in match we recommend the OEM part.
Moderate. Replacement requires recovering refrigerant, brazing or connecting the switch at the service port, and re-verifying the charge. This is a job for an EPA-certified HVAC technician. Electrical connection to the low-voltage control circuit is straightforward once the refrigerant work is complete.