OEM Carrier High & Low Pressure Switch for Model CH13NA02500GAAAA

These OEM pressure switches — 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH13NA02500GAAAA condensing unit. Pressure switches monitor refrigerant pressure on both the high and low sides of the system to protect the compressor from operating outside safe pressure limits. When either switch fails or trips, the unit will lock out on a fault code, fail to start, or shut down mid-cycle — often mimicking other failures and leading to misdiagnosis.

• Specs: 312926-252 — High Side Pressure Switch | 312926-258 — Low Side Pressure Switch | Factory-calibrated trip points matched to R-410A operating pressures | Spade terminal connections for direct OEM harness fit
• OEM vs Generic: OEM pressure switches use factory-calibrated setpoints specific to this model's refrigerant circuit. Aftermarket substitutes frequently use wider tolerance thresholds, risking compressor damage from undetected over- or under-pressure conditions.
• Install Difficulty: 2/5 — Refrigerant must be recovered before replacing pressure switches on a live system if fittings are not Schrader-isolated. Tools needed: manifold gauge set, spade terminal puller, and a multimeter to confirm open/closed status before and after replacement. Always tag and lock out power before servicing.
• Warranty: 1-year OEM factory warranty. Orders placed by 3 PM ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier CH13NA02500GAAAA condensing unit. Verify your existing switch OEM part number (312926-252 for high side or 312926-258 for low side) against your unit's wiring diagram or data plate before ordering. Not sure which switch you need? Our HVAC parts specialists can confirm fitment — contact us before you order and we'll get you the right part the first time.