OEM Carrier Pressure Switch with Bracket HK06WC090 for Model GB3AAV036075ABJA

This is the factory OEM replacement pressure switch with mounting bracket for the Carrier GB3AAV036075ABJA gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to confirm safe venting conditions before allowing the ignition sequence to proceed. When this switch fails or sticks open, the furnace will lock out before ignition — often displaying a fault code and leaving your home without heat. Common symptoms include the inducer motor running but the furnace never advancing to the ignition stage.

• Specs: OEM Part Number HK06WC090 | Includes factory mounting bracket | Rated water column (W.C.) pressure matched to GB3AAV036075ABJA specifications | Single-port pressure switch | 24V control circuit compatible
• OEM vs Generic: This factory OEM switch is calibrated to the exact W.C. rating required by your furnace's inducer assembly. Off-brand substitutes often use looser pressure tolerances, causing nuisance lockouts in cold weather or — more dangerously — allowing ignition under unsafe venting conditions.
• Install difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, manometer (recommended to verify W.C. after install). Disconnect the rubber hose and two wiring terminals, unmount the old bracket, and reverse the process to install. Always inspect the hose for cracks or blockages before replacing the switch.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed and factory-specified for the Carrier GB3AAV036075ABJA gas furnace. Always verify your existing switch's W.C. rating and hose port configuration against your unit's wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions.