OEM Carrier Low Pressure Switch 55-23# (312926-258) for Model PH14PB04800GBAAB

This is the genuine OEM low pressure switch (part number 312926-258), the factory-specified replacement for the Carrier PH14PB04800GBAAB heat pump. The low pressure switch continuously monitors refrigerant pressure on the low side of the system. When refrigerant pressure drops below the factory-set threshold, the switch opens and interrupts power to the compressor — protecting it from catastrophic damage caused by running in a low-charge or restricted-flow condition. Common failure symptoms include the system going into lockout shortly after startup, the compressor shutting off and failing to restart, or fault codes on the thermostat or control board indicating a low-pressure trip event.

• Specs: 55-23# pressure rating | OEM Sensata / Factory Authorized Parts assembly | Brass inlet connector | Precision-calibrated diaphragm | Pre-wired color-coded leads for direct reconnection
• OEM vs Generic: This genuine Carrier OEM switch is factory-calibrated to exact cut-in/cut-out set points. Aftermarket switches frequently carry wider pressure tolerances, risking nuisance trips or — worse — failing to protect the compressor under a true low-charge condition.
• Install Difficulty: 2/5 — Always recover refrigerant and depressurize the system before removing the switch. Tools needed: adjustable wrench, refrigerant recovery equipment, manifold gauges, and a multimeter to verify continuity post-install. Torque the brass fitting carefully to avoid cracking the port.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier PH14PB04800GBAAB heat pump. Verify your unit's data plate and existing switch pressure rating before ordering. Our fitment team is available to confirm compatibility — reach out before you order if you have any questions. In stock and ready to ship today.