OEM Carrier High & Low Pressure Switch for Model CH14NA04200GAAAA

These OEM pressure switches — 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH14NA04200GAAAA condensing unit. Pressure switches monitor refrigerant-side pressures and protect the compressor from operating under unsafe high- or low-pressure conditions. When either switch fails or trips, the system will lock out, refuse to start, or shut down immediately after attempting to run — often displaying a fault code on the control board.

• Specs: High Pressure Switch — Part# 312926-252 | Low Pressure Switch — Part# 312926-258 | Factory-calibrated trip points | SPST normally-closed contact configuration | Direct OEM replacement — no field calibration required
• OEM vs Generic: OEM pressure switches are calibrated to exact factory trip-point specifications for the CH14NA04200GAAAA refrigerant circuit. Generic substitutes often carry wider pressure tolerances, risking nuisance trips or — more critically — failing to protect the compressor from a genuine fault condition.
• Install Difficulty: 3/5 — Refrigerant-side work must be performed by an EPA 608-certified technician. Tools required: manifold gauge set, adjustable wrench, leak detection solution, multimeter. Always recover refrigerant per EPA regulations before disconnecting pressure switch fittings. Photograph all wiring connections prior to removal.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier CH14NA04200GAAAA condensing unit. Verify your existing switch part number (312926-252 for high-side or 312926-258 for low-side) against your unit's wiring diagram or data label before ordering. If you are unsure which switch has failed, our HVAC parts specialists can help confirm fitment before you buy — contact us before placing your order.