OEM Carrier High & Low Pressure Switch Kit 312926-252 / 312926-258 for Model PH13NB060000ABAA

This OEM matched pair includes the 312926-252 High Pressure Switch (670-470 PSI) and the 312926-258 Low Pressure Switch (55-23 PSI) — both factory-specified refrigerant safety controls for the Carrier PH13NB060000ABAA packaged heat pump. The high pressure switch monitors the refrigerant circuit for dangerous over-pressure conditions and cuts power to the compressor before damage occurs. The low pressure switch guards against low-charge or refrigerant loss scenarios that would cause the compressor to run unprotected. When either switch fails, the most common symptoms are hard lockout after startup, short-cycling within 30–60 seconds, or a system that runs in fan-only mode with no heating or cooling output.

• Part Numbers: 312926-252 (High Pressure Switch, 670 cut-out / 470 cut-in PSI) | 312926-258 (Low Pressure Switch, 55 cut-out / 23 cut-in PSI) | Factory Authorized Carrier OEM parts
• OEM vs Generic: OEM switches are factory-calibrated to exact PSI set points for the PH13NB060000ABAA refrigerant circuit. Generic alternatives often carry ±15% pressure tolerance, risking nuisance trips or — worse — failure to protect the compressor under true fault conditions.
• Install Difficulty: 3/5 — Refrigerant system work requires an EPA 608 certification. Recover refrigerant before accessing the refrigerant circuit. Tools needed: manifold gauge set, torque wrench, multimeter (to verify switch continuity before recharging). Always lock out/tag out the unit before beginning work.
• Warranty: 1-year OEM manufacturer warranty. Both switches ship same business day from our warehouse — no split orders, no waiting.

Compatibility: Engineered as direct OEM replacements for the Carrier PH13NB060000ABAA packaged heat pump. Verify your unit's data plate refrigerant type and confirm existing switch wiring color codes before disconnecting. Selling both switches together eliminates repeat service calls — if one has failed from age or overload, the second is typically near end-of-life as well. Questions about fitment? Our HVAC parts team confirms compatibility before you order — in stock and ships today.