OEM Carrier High Pressure Switch 312926-252 (670-470#) for Model PH15NB06000GBAAA

The Carrier 312926-252 is a factory OEM High Pressure Switch rated at 670 PSIG cut-out / 470 PSIG cut-in. It is a critical refrigerant-circuit safety device on the PH15NB06000GBAAA package heat pump unit. Its role is to monitor high-side refrigerant pressure and open the control circuit if pressure exceeds the safe operating threshold — protecting the compressor from catastrophic damage caused by over-pressurization. Common failure symptoms include nuisance high-pressure lockouts, fault codes indicating a high-pressure trip, compressor short-cycling, or a complete no-cooling/no-heating condition with a diagnostic LED fault on the control board.

• Specs: 670 PSIG cut-out | 470 PSIG cut-in | Factory Authorized Part (FAP) | Sensata / RCD-series construction | Brass inlet connector | Pre-wired leads
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part (FAP), manufactured to exact OEM pressure set-points. Generic switches often carry ±10–15% tolerance on trip pressure, which can allow unsafe over-pressure events or cause false nuisance trips — neither is acceptable in a refrigerant circuit.
• Install difficulty: 3/5 — Refrigerant recovery is required before replacing a pressure switch. This repair must be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, refrigerant recovery machine, torque wrench, multimeter. Always verify the system is fully depressurized before disconnecting the switch.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH15NB06000GBAAA packaged heat pump unit. This listing covers the High Pressure Switch (312926-252). If your unit also requires the companion Low Pressure Switch, order part 312926-258 (55-23# cut-out/cut-in). Always cross-reference your unit's data plate and wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy — reach out before placing your order.