OEM Carrier Low Pressure Switch 312926-258 for Model CH16NA06000GBAAA

This is the OEM factory-specified low pressure switch (part number 312926-258) for the Carrier CH16NA06000GBAAA system. The pressure switch is a critical safety component that monitors negative pressure created by the inducer draft motor to verify proper venting before allowing ignition to proceed. When the switch fails — or when the pressure it monitors falls outside the rated water column (W.C.) threshold — the control board receives no confirmation signal and locks out the heating cycle. Common symptoms include a furnace or system that attempts to start, runs the inducer motor briefly, then shuts down without ever reaching ignition, often triggering a fault code related to pressure switch failure.

• Specs: Low pressure switch | OEM Part# 312926-258 | Factory-calibrated W.C. (water column) set point | Normally open (NO) single-port design | Direct OEM replacement — no field calibration required
• OEM vs Generic: This is a genuine Carrier OEM component manufactured to exact factory tolerances. Generic aftermarket pressure switches frequently carry imprecise W.C. ratings, which can cause nuisance lockouts or — worse — allow ignition under unsafe venting conditions. OEM is the only safe choice for pressure switch replacement.
• Install Difficulty: 2/5 — Disconnect power before servicing. Tools needed: flathead screwdriver, needle-nose pliers, and a manometer if verifying W.C. rating post-install. Inspect the rubber hose port and tubing for cracks or blockages before installing the new switch, as a clogged port is a frequent root cause of switch failure.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Designed specifically for the Carrier CH16NA06000GBAAA. Always verify the OEM part number 312926-258 on the original switch label before ordering to confirm correct W.C. rating for your specific configuration. Our parts specialists are available to verify fitment before you order — don't guess on a safety switch.