OEM Carrier Low Pressure Switch 55-23# (312926-258) for Model PH16NC06000GABAA

This is the genuine OEM Carrier low pressure switch (part number 312926-258), factory-specified for the Carrier PH16NC06000GABAA heat pump. The low pressure switch continuously monitors refrigerant pressure on the low side of the system. When pressure drops below the factory-set threshold — due to refrigerant loss, a blocked metering device, or a failing expansion valve — the switch opens and cuts power to the compressor, preventing catastrophic damage from a low-charge run condition. If your system is short-cycling, locking out on a fault code, or the compressor shuts off shortly after startup, a failed low pressure switch is one of the first components to check.

• Specs: 55-23# rated | Cut-out: 55 PSIG | Cut-in: 23 PSIG | Brass inlet connector | Precision-calibrated diaphragm | Factory-authorized OEM replacement
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part — not an aftermarket substitute. OEM switches are calibrated to exact cut-in/cut-out pressures. Generic alternatives may drift outside specification, causing nuisance lockouts or, worse, failing to protect the compressor under a true low-charge condition.
• Install difficulty: 2/5 — Refrigerant recovery is required before replacing a low-side pressure switch. Tools needed: refrigerant recovery machine, manifold gauge set, adjustable wrench, and a multimeter to verify continuity across switch terminals before re-commissioning. This repair should be performed by an EPA 608-certified technician.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for the Carrier PH16NC06000GABAA heat pump. Always verify the part number printed on your existing switch label before ordering. Our fitment team is available to confirm compatibility — reach out before you buy if you have any questions. Order today and receive same-day shipping on all in-stock parts.