OEM Carrier SPST High-Fire Pressure Switch HK06WC091 for Model PG8MAA048110AAJA

This OEM pressure switch is the factory-specified replacement for the Carrier PG8MAA048110AAJA gas furnace. The pressure switch is a critical safety device that monitors the negative pressure (vacuum) generated by the draft inducer motor before allowing the ignition sequence to proceed. When the switch fails or sticks open, the furnace control board will not advance past the inducer stage — resulting in a no-heat lockout, often accompanied by a diagnostic fault code. A failed pressure switch is one of the most common causes of furnace lockout on 80% AFUE gas furnace platforms.

• Specs: SPST (Single-Pole, Single-Throw) | High-Fire rated | Factory Honeywell-manufactured | Direct OEM replacement for part number HK06WC091 (superseded by HK06MC110)
• OEM vs Generic: This is a Factory Authorized Part built to exact Carrier pressure setpoint specifications. Generic aftermarket switches are often calibrated to broader tolerances, risking nuisance trips or — worse — unsafe operation if the setpoint is too low.
• Install Difficulty: 2/5 — The pressure switch is accessible after removing the furnace front panel. Tools needed: flat-head screwdriver, needle-nose pliers, and a digital manometer or magnehelic gauge to verify inducer vacuum if diagnosing root cause. Always confirm the inducer motor and flue are clear before condemning the switch.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG8MAA048110AAJA 80% AFUE gas furnace. This part number has been superseded — our listing ships the current authorized replacement ensuring full factory fit and function. Verify your existing switch's W.C. rating from the data plate before ordering, or contact our team for fitment confirmation. Order today for same-day shipping.