OEM Carrier Gas Pressure Switch HK02LB008 / HK06WC091 for Model PG8MEA048090ACJA

This OEM gas pressure switch is the factory-specified replacement for the Carrier PG8MEA048090ACJA packaged gas unit. The pressure switch is a critical safety component that monitors the negative pressure (vacuum) created by the draft inducer motor. If the inducer fails to establish the correct airflow for safe flue venting, the pressure switch prevents the gas valve from opening — stopping the furnace before a dangerous condition can develop. When this switch fails, the furnace will typically lock out during the pre-ignition sequence: the inducer runs, but the system never advances to the spark or hot surface ignition stage. Fault codes pointing to a failed or stuck pressure switch are among the most common no-heat service calls on Carrier packaged gas units.

• OEM Part Numbers: HK02LB008 (Gas Pressure Switch, 6.5" WC cut-out) | HK06WC091 (SPST Pressure Switch, High Fire) — both factory-matched for the PG8MEA048090ACJA
• OEM vs Generic: OEM Carrier pressure switches are factory-calibrated to exact W.C. setpoints. Aftermarket units frequently ship with loose tolerances, risking nuisance trips or — worse — failing to open during an actual flue blockage. For a safety-critical switch, OEM is the only recommended choice.
• Install difficulty: 2/5 — Shut off gas and power before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a manometer (recommended for verification). Swap one hose connection at a time to avoid mis-routing the pressure tubing. Always verify switch operation with a multimeter before reassembly.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG8MEA048090ACJA packaged gas furnace/AC unit. Also fits a broad range of Carrier, Bryant, and Payne gas furnaces and packaged units sharing the same pressure switch specification — verify the W.C. rating on your unit's existing switch before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy. Order now — in stock and ships today.