OEM Carrier High & Low Pressure Switch Kit (312926-252 / 312926-258) for Model PH14NB06000GAAAA

These factory OEM pressure switches are the direct replacements for the Carrier PH14NB06000GAAAA packaged heat pump unit. The high pressure switch (312926-252, 670/470 PSI) monitors refrigerant discharge pressure and shuts down the compressor if pressure exceeds safe limits — protecting the system from catastrophic failure. The low pressure switch (312926-258, 55/23 PSI) guards against low-charge or loss-of-refrigerant conditions by cutting power to the compressor before damage occurs. Common failure symptoms include hard lockouts, nuisance tripping, or a unit that short-cycles and won't stay running. A failed pressure switch often triggers a fault code on the control board before any other component is tested.

• Part Numbers: 312926-252 (High Pressure Switch, 670/470 PSI cutout/reset) | 312926-258 (Low Pressure Switch, 55/23 PSI cutout/reset) — both are genuine Carrier Factory Authorized Parts
• OEM vs Generic: OEM switches are factory-calibrated to exact PSI setpoints for the PH14NB06000GAAAA refrigerant circuit. Generic alternatives may drift in calibration over time, causing nuisance trips or, worse, failing to protect the compressor under genuine fault conditions.
• Install Difficulty: 3/5 — Refrigerant circuit work requires an EPA 608 certified technician. Tools needed: manifold gauge set, needle-nose pliers, wire crimper/stripper, multimeter. Always recover refrigerant before disconnecting any pressure-side fittings. Photograph wiring before removal.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH14NB06000GAAAA packaged heat pump. Verify your unit's data plate PSI ratings match 670/470# (high) and 55/23# (low) before ordering. Not sure? Our HVAC parts specialists verify fitment before you buy — contact us today. Order now and ship today.