OEM Carrier High & Low Pressure Switch Kit (312926-252 / 312926-258) for Model PH13NA060000ABAA

These are the factory OEM replacement pressure switches for the Carrier PH13NA060000ABAA heat pump. The high pressure switch (312926-252, rated 670-470 PSI) and the low pressure switch (312926-258, rated 55-23 PSI) work together to monitor refrigerant circuit pressure and protect the compressor from operating outside safe pressure boundaries. When either switch faults or fails, the system will typically lock out before or immediately after startup — presenting as a no-cooling/no-heating call with a fault code on the control board. Replacing both switches together is best practice whenever one has failed, as age and refrigerant-side contamination affect both simultaneously.

• Specs — High Pressure Switch (312926-252): 670 PSI cut-out / 470 PSI cut-in | Factory Authorized Part | Genuine Carrier OEM | Replaces 312926252
• Specs — Low Pressure Switch (312926-258): 55 PSI cut-out / 23 PSI cut-in | Factory Authorized Part | Genuine Carrier OEM | Replaces 312926258
• OEM vs Generic: OEM switches are factory-calibrated to exact cut-in/cut-out tolerances, ensuring reliable compressor protection. Generic aftermarket pressure switches often carry wider tolerance bands that can allow compressor operation in damaging pressure ranges or cause nuisance trips.
• Install difficulty: 3/5 — System must be recovered or isolated before disconnecting refrigerant-side fittings. Tools needed: manifold gauge set, adjustable wrench, needle-nose pliers, multimeter. EPA 608 certification required for refrigerant handling. Always verify wiring polarity before reconnecting leads.
• Warranty: 1-year OEM manufacturer warranty on both switches. Ships same business day from our warehouse.

Compatibility: Designed as direct OEM replacements for Carrier PH13NA060000ABAA packaged heat pump units. Verify your unit's data plate and existing pressure switch ratings before ordering. Our fitment team is available to confirm compatibility — reach out before you order if you have any questions.