OEM Carrier Gas Pressure Switch HK02LB008 / HK06WC091 for Model PG8MEA048070ACJA

This OEM gas pressure switch is the factory-specified replacement for the Carrier PG8MEA048070ACJA packaged gas unit. The pressure switch monitors the negative pressure (vacuum) created by the draft inducer motor to confirm safe combustion airflow before allowing the gas valve to open. When it fails or sticks open, the furnace will lock out before ignition — leaving you with a blinking error code and no heat. Common symptoms include the inducer running but the furnace never advancing past the pre-purge stage, or a fault code indicating a failed pressure switch.

• OEM Part Numbers: HK02LB008 (Gas Pressure Switch) | HK06WC091 (Pressure Switch High Fire) — both are factory-authorized Carrier/Honeywell parts covering this model's pressure switch circuit
• Specs: SPST configuration | Rated for LP and natural gas applications | Cut-out pressure set at 6.5" W.C. | Mounts horizontally or vertically | Compatible with Carrier, Bryant, and Payne platforms
• OEM vs Generic: OEM pressure switches are factory-calibrated to the exact W.C. setpoint for the PG8MEA048070ACJA heat exchanger. Generic aftermarket units often carry wider pressure tolerances that can cause nuisance lockouts or — worse — allow the furnace to fire without confirmed draft, creating a carbon monoxide risk.
• Install difficulty: 2/5 — Power down and lock out the unit before starting. Tools needed: 1/4" nut driver, flat-head screwdriver, manometer (recommended to verify W.C. after swap). Photograph hose routing before disconnecting. Note: always inspect the rubber hose and port for blockage before condemning the switch itself.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8MEA048070ACJA packaged gas unit. Also fits a wide range of Carrier, Bryant, and Payne furnaces and packaged units sharing the same inducer and pressure switch specification — verify the W.C. rating on your existing switch before ordering. Not sure it fits? Our team verifies fitment before you order. In stock — order now for same-day shipping.