OEM Carrier Low Pressure Switch 55-23# (312926-258) for Model PH16NA03600GACAA

This is the genuine OEM Carrier Low Pressure Switch (part number 312926-258), factory-specified for the Carrier PH16NA03600GACAA heat pump system. The low pressure switch continuously monitors refrigerant-side pressure and acts as a critical safety device: when refrigerant pressure falls below the factory-set threshold, the switch opens and interrupts operation to prevent compressor damage from low-charge or restricted-flow conditions. A failed low pressure switch typically causes repeated short-cycling, a system lockout fault code, or a unit that starts briefly and shuts down within seconds.

• Specs: 55-23# Low Pressure Switch | Manufacturer: Carrier (OEM) | Cross-reference: Sensata PS80-02-F1270 | Pre-wired with color-coded leads | Brass inlet connector with precision-calibrated diaphragm
• OEM vs Generic: This OEM unit is factory-calibrated to exact cut-in/cut-out pressure thresholds for the PH16NA03600GACAA. Aftermarket switches may carry wider pressure tolerances, risking nuisance trips or — worse — failure to protect the compressor under a genuine low-charge condition.
• Install Difficulty: 2/5 — Always recover refrigerant per EPA Section 608 regulations before opening the refrigerant circuit. Tools needed: manifold gauge set, refrigerant recovery unit, adjustable wrench, multimeter. Photograph all wiring before disconnecting leads. Verify system pressure after reinstallation before restarting.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH16NA03600GACAA heat pump. Always verify your unit's data plate and existing switch markings match the 55-23# specification before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — reach out before placing your order.