OEM Carrier High & Low Pressure Switch for Model CH14NB02400GAAAA

These OEM pressure switches — 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH14NB02400GAAAA heat pump condenser. Pressure switches monitor refrigerant circuit pressures and protect the compressor by shutting down operation if pressures fall outside safe operating limits. When either switch fails, you'll typically see the system lock out, short-cycle, or display a fault code without completing a full heating or cooling cycle.

• Specs: 312926-252 — High Pressure Switch | 312926-258 — Low Pressure Switch | Factory-calibrated trip points | 24V control circuit compatible | Spade terminal connections
• OEM vs Generic: OEM pressure switches are calibrated to exact factory trip-point specifications for the CH14NB02400GAAAA refrigerant circuit. Generic substitutes often carry wider pressure tolerances, risking nuisance lockouts or, worse, insufficient compressor protection.
• Install difficulty: 3/5 — Refrigerant circuit work must be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, flathead screwdriver, multimeter, and spade terminal connectors. Always recover refrigerant before disconnecting high-side components.
• Warranty: 1-year OEM factory warranty. Orders placed by 3 PM EST ship same business day from our warehouse.

Compatibility: Fits Carrier model CH14NB02400GAAAA heat pump condensers. Select the correct switch — 312926-252 for the high-pressure circuit or 312926-258 for the low-pressure circuit — and verify part number against your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility prior to purchase. In stock and ready to ship today.