OEM Carrier High & Low Pressure Switch for Model CH13NA06100GBABA
These OEM pressure switches — 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH13NA06100GBABA condensing unit. Pressure switches prove that the inducer motor has established adequate airflow through the heat exchanger before the ignition sequence is allowed to proceed. A failed pressure switch will strand the system in a pre-ignition lockout, triggering a fault code and preventing any heat output entirely.
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Specs: 312926-252 = High Pressure Switch | 312926-258 = Low Pressure Switch | Factory-calibrated W.C. (inches water column) rating | SPST normally-open contacts | Fits standard 1/4" hose barb port
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OEM vs Generic: OEM pressure switches are factory-calibrated to the exact W.C. trip point required by the Carrier CH13NA06100GBABA heat exchanger design. Generic alternatives frequently carry wider trip-point tolerances, risking nuisance lockouts in cold weather or, worse, allowing operation under unsafe draft conditions.
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Install difficulty: 2/5 — Confirm system power is off at the breaker before starting. Tools needed: 1/4" nut driver, flathead screwdriver, needle-nose pliers, and a manometer or magnehelic gauge to verify hose integrity post-installation. Photograph all hose routing and wiring before disconnecting.
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Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.
Compatibility: Engineered specifically for the Carrier CH13NA06100GBABA condensing unit. Verify which switch — high (312926-252) or low (312926-258) — is indicated by your system's fault code or diagnostic LED before ordering. If you are unsure, our team will verify exact fitment before your order ships. In stock and ready to ship today — get your system back online fast.