OEM Carrier Pressure Switch w/ Bracket (HK06WC090) for Model GB3AAV024070AFJA

This OEM pressure switch with bracket is the factory-specified replacement part (HK06WC090) for the Carrier GB3AAV024070AFJA gas furnace. The pressure switch is a critical safety component that monitors negative air pressure produced by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails or gets stuck, the furnace will enter a lockout condition — typically before the igniter even energizes — leaving your home without heat. Common symptoms include a furnace that short-cycles, flashes a pressure switch fault code, or simply won't progress past the inducer startup stage.

• Specs: OEM part number HK06WC090 | Includes factory mounting bracket | Rated to exact W.C. (water column) specification for the GB3AAV024070AFJA | Direct drop-in replacement with no modification required
• OEM vs Generic: OEM pressure switches are calibrated to the exact W.C. rating Carrier specifies for this furnace. Aftermarket substitutes frequently carry wider tolerances, risking nuisance trips or — more dangerously — failing to detect a true venting fault, creating a potential safety hazard.
• Install difficulty: 2/5 — Shut off power and gas before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, and a manometer to verify switch trip point if desired. Disconnect the hose port and two-wire harness, swap the bracket-mounted switch, and reconnect. Always inspect the rubber sensing hose for cracks while the panel is open.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier GB3AAV024070AFJA gas furnace. Verify your existing part number on the switch body or your unit's wiring diagram before ordering to ensure an exact match. Our fitment team is available to confirm compatibility before you purchase — same-day shipping on all in-stock orders.