OEM Carrier Low Pressure Switch 55-23# (312926-258) for Model PH13PA04800GABAA

This is the factory OEM low pressure switch for the Carrier PH13PA04800GABAA heat pump. The low pressure switch continuously monitors refrigerant pressure on the low side of the system and opens the circuit to the compressor if pressure drops below the safe threshold — protecting the compressor from catastrophic damage caused by refrigerant loss or a restricted metering device. Common failure symptoms include the system locking out shortly after startup, the compressor refusing to energize, or a fault code indicating a low-pressure trip event at the thermostat or control board.

• Specs: 55 PSI cut-out / 23 PSI cut-in | Factory-calibrated SPST normally-closed switch | Brass inlet connector with precision-calibrated diaphragm | Compact form factor — 2" H × 1" W × 0.5" D | Weight: 0.34 lbs
• OEM vs Generic: Carrier OEM part 312926-258 is factory-set and factory-tested to exact cut-in/cut-out pressure tolerances. Aftermarket alternatives often carry wider pressure tolerances, risking nuisance trips or, worse, inadequate compressor protection.
• Install Difficulty: 2/5 — Recover all refrigerant per EPA Section 608 regulations before replacing. Tools needed: manifold gauge set, refrigerant recovery machine, adjustable wrench, wire strippers. Pre-wired color-coded leads simplify reconnection. Always verify refrigerant charge after reinstallation.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier PH13PA04800GABAA 4-ton 13 SEER heat pump. Verify your unit's data plate and existing switch markings match the 55-23# pressure rating before ordering. Our fitment team is available to confirm compatibility — call or chat before you order. Order now and ship today!