OEM Carrier High & Low Pressure Switch Kit for Model PH13NB03600GAAAA

This factory-matched OEM pressure switch kit includes both the high pressure switch (312926-252) and the low pressure switch (312926-258) for the Carrier PH13NB03600GAAAA heat pump. Refrigerant-side pressure switches monitor system pressure in real time and send a safety signal to the control board to shut the compressor down if pressures fall outside safe operating limits. A failed high pressure switch can trigger nuisance lockouts on hot days, while a failed low pressure switch commonly causes the system to shut off during low-ambient or low-refrigerant conditions. In both cases, the result is a no-cooling or no-heating fault that won't clear until the defective switch is replaced.

• Specs: High Pressure Switch — OEM Part# 312926-252 | Low Pressure Switch — OEM Part# 312926-258 | Factory-calibrated trip/reset points | Spade terminal connections | Direct OEM replacement — no modification required
• OEM vs Generic: OEM pressure switches are calibrated to exact factory trip and reset thresholds, ensuring the compressor is protected at the correct pressure limits. Generic alternatives often carry wider tolerance bands, risking premature trips or, worse, inadequate compressor protection and shortened system life.
• Install difficulty: 3/5 — Refrigerant-side pressure switches require recovering or isolating refrigerant before replacement on some configurations. Tools needed: manifold gauge set, 1/4" nut driver, multimeter, refrigerant recovery equipment (if required by local code). Always de-energize the unit at the disconnect before servicing.
• Warranty: 1-year OEM factory warranty on both switches. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: This kit is engineered for the Carrier PH13NB03600GAAAA single-stage heat pump (3-ton, R-410A). Always verify OEM part numbers 312926-252 and 312926-258 against your unit's wiring diagram or data plate before ordering. Our fitment specialists are available to confirm compatibility before you buy — order today and get same-day shipping!