OEM Carrier High & Low Pressure Switch for Model CH13NA03100GABAA

These OEM pressure switches — 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH13NA03100GABAA condensing unit. Pressure switches monitor refrigerant circuit pressures and send a safety signal to the control board. When either switch fails or trips out of range, the system will lock out, preventing the unit from running entirely. Common symptoms include the system failing to start, short-cycling, or throwing a pressure-fault error code on the thermostat or control board.

• Specs: 312926-252 — High Pressure Switch (opens on high-side overpressure) | 312926-258 — Low Pressure Switch (opens on low-side pressure drop) | 24V control circuit compatible | Factory-calibrated trip points for R-410A refrigerant systems
• OEM vs Generic: OEM pressure switches are calibrated to exact factory trip-point specifications for the CH13NA03100GABAA. Generic alternatives often use looser tolerances, risking nuisance lockouts or — more critically — failure to protect the compressor from damaging pressure events.
• Install Difficulty: 3/5 — Refrigerant must be recovered before replacing pressure switches on live refrigerant lines. Tools needed: manifold gauge set, refrigerant recovery equipment, adjustable wrench, multimeter. EPA Section 608 certification required for refrigerant handling. Verify the faulty switch with a multimeter (open circuit at rest = failed switch).
• Warranty: 1-year OEM factory warranty on both part numbers. Orders ship same business day from our stocked warehouse.

Compatibility: Both 312926-252 and 312926-258 are direct factory replacements for the Carrier CH13NA03100GABAA condensing unit. Confirm your existing switch part number and high- or low-side location before ordering. If you're unsure which switch has failed, our team can help verify fitment and diagnostics before you buy. In stock and ready to ship today — get your system back online fast.