OEM Carrier High & Low Pressure Switch Kit (312926-252 & 312926-258) for Model PH15NB02400GBAAA

This factory-authorized OEM pressure switch kit includes both the high pressure switch (312926-252, 670-470#) and the low pressure switch (312926-258, 55-23#) designed specifically for the Carrier PH15NB02400GBAAA heat pump. Pressure switches serve as the refrigerant circuit's first line of defense: the high-side switch trips and shuts down the compressor when discharge pressure exceeds safe limits (670# cut-out / 470# cut-in), while the low-side switch opens the control circuit when suction pressure drops dangerously low (55# cut-out / 23# cut-in). Common failure symptoms include nuisance lockouts with a pressure fault code, the system short-cycling immediately after startup, or a compressor that runs only briefly before going into hard lockout — all without any refrigerant leak or mechanical issue present.

• Specs — High Pressure Switch (312926-252): 670 PSI cut-out / 470 PSI cut-in | Auto-reset | SPST normally closed | Factory Authorized Part (FAP)
• Specs — Low Pressure Switch (312926-258): 55 PSI cut-out / 23 PSI cut-in | Auto-reset | SPST normally closed | Factory Authorized Part (FAP)
• OEM vs Generic: These are genuine Carrier Factory Authorized Parts, matched to exact cut-in/cut-out calibration for the PH15NB02400GBAAA refrigerant circuit. Generic switches frequently carry wider pressure tolerances, risking nuisance trips or — worse — failing to protect the compressor at the correct threshold.
• Install Difficulty: 3/5 — Refrigerant recovery is required before replacing pressure switches on a sealed system. Tools needed: manifold gauge set, recovery machine, torque wrench, 1/4" flare fittings, and a multimeter to confirm open/closed state before reinstallation. Licensed EPA 608-certified technician required.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PH15NB02400GBAAA. Always verify refrigerant type and pressure ratings on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you purchase — call or chat today. Order before 3 PM and your part ships the same day.