OEM Carrier Low Pressure Switch 55-23# (312926-258) for Model PH14EB03600GBAAB

The Carrier 312926-258 is the factory-specified OEM low pressure switch for the PH14EB03600GBAAB heat pump system. This safety-critical component continuously monitors suction-side refrigerant pressure in the system. When pressure drops below the factory-set threshold of 23 PSI, the switch opens the control circuit, cutting power to the compressor to prevent catastrophic damage from refrigerant loss or a blocked metering device. Common failure symptoms include the system refusing to start, the compressor short-cycling, or an intermittent lockout condition — particularly on warm days when refrigerant demand is highest.

• Specs: 55-23# pressure rating (opens at 23 PSI, closes at 55 PSI) | Factory-calibrated Sensata / PS80-02-F1270 compatible | Brass inlet connector | Pre-wired leads for direct connection | Part No. 312926-258
• OEM vs Generic: This is a genuine OEM Carrier part, manufactured to exact factory pressure thresholds. Aftermarket switches often carry ±5–10% calibration variance, which can allow the compressor to run under unsafe low-pressure conditions — risking a failed compressor and a far more expensive repair.
• Install Difficulty: 2/5 — Recover refrigerant and de-energize the system before beginning work. Tools needed: manifold gauge set, refrigerant recovery unit, adjustable wrench, multimeter. Verify refrigerant charge after replacement to confirm the root cause of low-pressure tripping has been resolved.
• Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for the Carrier PH14EB03600GBAAB heat pump. Always verify your unit's data plate and existing switch pressure ratings before ordering. Not sure if this part fits? Our HVAC parts specialists are available to confirm fitment before you buy — order with confidence and get back up and running fast.