OEM Carrier Low Pressure Switch 55-23# (312926-258) for Model PH16NC06000GBAAA

This OEM low pressure switch (part number 312926-258) is the factory-specified replacement for the Carrier PH16NC06000GBAAA heat pump. The low pressure switch continuously monitors refrigerant pressure on the suction side of the system. When refrigerant pressure drops below the factory-set threshold — due to a leak, blocked filter, or low charge — the switch opens and shuts down the compressor to prevent catastrophic damage. Common failure symptoms include the system locking out on a low-pressure fault, the compressor cycling off shortly after startup, or the unit running but delivering no cooling or heating.

• Specs: 55-23# pressure rating | Cut-out: 55 PSIG | Cut-in: 23 PSIG | OEM Sensata / Factory Authorized Parts designation | Pre-wired leads for direct plug-in installation
• OEM vs Generic: This is a genuine Carrier OEM part (312926-258), precision-calibrated to factory cut-in/cut-out tolerances. Generic pressure switches often use looser set-point tolerances that can allow the compressor to run under unsafe low-charge conditions, risking compressor burnout.
• Install difficulty: 2/5 — Recover refrigerant charge before disconnecting the switch from the liquid or suction line. Tools needed: refrigerant recovery unit, manifold gauges, wire connectors, multimeter. Always verify system charge after reinstallation and confirm switch continuity before startup.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3PM local time.

Compatibility: Direct OEM replacement for Carrier model PH16NC06000GBAAA heat pumps. Always verify the 55-23# pressure rating against your unit's data plate and wiring diagram before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — no guesswork, no hassle.