OEM Carrier High & Low Pressure Switch for Model CH13NA04200GAAAA

These OEM pressure switches — 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH13NA04200GAAAA condensing unit. Pressure switches prove that the inducer motor has established adequate airflow before the control board allows ignition to proceed. When either switch fails or sticks open, the system will lock out prior to ignition, leaving you with no heat and often a diagnostic fault code pointing to a pressure or inducer circuit fault.

• Specs: 312926-252 — High Pressure Switch | 312926-258 — Low Pressure Switch | Factory-calibrated W.C. (water column) rating | OEM-matched electrical terminals for direct plug-in replacement
• OEM vs Generic: OEM pressure switches are calibrated to the exact W.C. trip point required by your Carrier unit. Aftermarket switches frequently carry wider tolerances, risking nuisance lockouts or — more dangerously — failure to detect a true inducer fault, compromising system safety.
• Install Difficulty: 2/5 — Shut off power at the disconnect and confirm voltage is absent before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, a manometer (recommended to verify W.C. after installation). Photograph all hose and wire connections before removal to ensure correct reassembly.
• Warranty: 1-year OEM factory warranty on both switches. Orders placed before the daily cutoff ship the same business day from our warehouse.

Compatibility: Both switches are engineered specifically for the Carrier CH13NA04200GAAAA condensing unit. Confirm your existing switch part number (printed on the switch body label) matches 312926-252 or 312926-258 before ordering. If you are unsure which switch has failed, our HVAC parts specialists can help verify fitment and guide your diagnosis before you buy.