OEM Carrier High & Low Pressure Switch for Model CH14NA06000GBBAA

These OEM pressure switches — 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH14NA06000GBBAA condensing unit. Pressure switches monitor the inducer motor's draft pressure to confirm safe venting conditions before allowing the ignition sequence to proceed. When either switch fails or sticks open, the control board cannot verify proper airflow and will lock out the system entirely — leaving you with a furnace or heat pump that attempts to start but shuts down before any heat is produced. Common symptoms include a status code indicating pressure switch fault, an inducer motor running continuously with no ignition, or intermittent heating failures in cold or windy conditions.

• Specs: Part 312926-252 — High Pressure Switch | Part 312926-258 — Low Pressure Switch | Factory W.C. (water column) rating matched to Carrier CH14NA06000GBBAA inducer assembly | SPST normally open contacts | 1/4" spade terminal connections
• OEM vs Generic: OEM pressure switches are calibrated to the exact W.C. trip point required by this model. Aftermarket units frequently carry wider tolerances, risking nuisance lockouts or, more critically, allowing operation under unsafe venting conditions that could affect combustion safety.
• Install difficulty: 3/5 — Requires shutting off power and gas supply before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, manometer (recommended to verify W.C. after install), and a multimeter to confirm switch continuity. Inspect rubber hose ports for cracks or blockages before installing new switch — a blocked port is a leading cause of switch failure.
• Warranty: 1-year OEM factory warranty on both switches. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Both 312926-252 and 312926-258 are designed specifically for the Carrier CH14NA06000GBBAA. Confirm which switch — high or low — has failed using your system's diagnostic fault code and a multimeter continuity test before ordering. If you are unsure which part applies to your repair, our HVAC parts specialists can verify fitment before you buy. Order today and get your system back online fast — in stock and ships today.