OEM Carrier Pressure Switch with Bracket for Model GB3AAV060090AAJA (HK06WC090)

This OEM pressure switch with bracket is the factory-specified replacement for the Carrier GB3AAV060090AAJA gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to confirm safe flue venting before allowing the ignition sequence to proceed. When this switch fails or its hose becomes cracked or blocked, the control board receives no proof-of-draft signal and locks out the furnace — leaving you with a system that attempts to start, flashes a diagnostic fault code, and shuts down before the burners ever fire.

• Specs: Factory-calibrated W.C. (water column) rating matched to Carrier GB3AAV060090AAJA | Includes pre-installed mounting bracket for direct drop-in fitment | OEM part number HK06WC090 | 1/4" Spade terminals for plug-and-play wiring
• OEM vs Generic: This OEM switch is factory-calibrated to the precise W.C. set point required by the GB3AAV060090AAJA inducer assembly. Aftermarket switches frequently ship with off-tolerance trip points that cause nuisance lockouts in cold weather or, worse, allow the furnace to fire under unsafe venting conditions.
• Install difficulty: 2/5 — Turn off power and gas before beginning. Tools needed: 1/4" nut driver, flathead screwdriver, needle-nose pliers. Inspect the rubber hose connecting the switch to the inducer housing for cracks or blockages before condemning the switch — a clogged hose is a common root cause of identical symptoms. Photograph all wiring connections prior to removal.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed specifically for the Carrier GB3AAV060090AAJA gas furnace. Always verify the OEM part number HK06WC090 against your unit's data plate or existing switch label before ordering. Our fitment team is available to confirm compatibility if you have any questions before you buy.