OEM Carrier High & Low Pressure Switch Kit (312926-252 / 312926-258) for Model PH15NA03600GBAAA

This factory-authorized OEM pressure switch kit includes both the 312926-252 High Pressure Switch (670-470 PSI) and the 312926-258 Low Pressure Switch (55-23 PSI) — the two refrigerant safety switches specified for the Carrier PH15NA03600GBAAA heat pump. Together, these switches continuously monitor refrigerant circuit pressure and protect the compressor from operating under unsafe high- or low-pressure conditions. Common failure symptoms include the unit locking out immediately on startup, short-cycling within the first few minutes of operation, or fault codes indicating a refrigerant pressure trip on the system control board.

• Specs — High Pressure Switch (312926-252): 670 PSI cut-out / 470 PSI cut-in | SPST-NC | Factory Authorized Parts (Carrier RCD) | Sensata-manufactured | Rated for R-410A refrigerant systems
• Specs — Low Pressure Switch (312926-258): 55 PSI cut-out / 23 PSI cut-in | SPST-NC | Factory Authorized Parts (Carrier RCD) | Sensata PSL series | Compatible with R-410A refrigerant
• OEM vs Generic: OEM Carrier pressure switches are factory-calibrated to exact cut-in/cut-out thresholds. Aftermarket switches commonly exhibit ±10–15% pressure tolerance drift, risking nuisance trips or — worse — failure to protect the compressor under actual fault conditions.
• Install Difficulty: 3/5 — Refrigerant circuit work requires an EPA 608-certified technician. The system must be recovered or isolated before switch replacement. Tools needed: manifold gauge set, wire terminals, torque wrench, multimeter for continuity verification. Always note wire orientation before disconnecting.
• Warranty: 1-year OEM manufacturer warranty. Both parts ship same business day from our warehouse — individually or as a matched set.

Compatibility: Engineered specifically for the Carrier PH15NA03600GBAAA 3-ton packaged heat pump. Verify your unit's refrigerant type (R-410A) and data plate pressure ratings before installing. Replacing both switches simultaneously is strongly recommended when one has failed, as both operate within the same refrigerant circuit and share similar service life. Our HVAC parts specialists can confirm fitment before you order — contact us anytime.