OEM Carrier Pressure Switch with Bracket for Model GB1AAV060090AAJA — Part# HK06WC090

This is the factory OEM replacement pressure switch with mounting bracket for the Carrier GB1AAV060090AAJA 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 control board cannot verify inducer operation and will lock out the heating cycle entirely — typically displaying a fault code and leaving your home without heat. Common symptoms include the inducer running briefly followed by a hard lockout, a blinking fault LED, or a furnace that simply will not advance past the inducer-on stage.

• Specs: Replaces OEM part number HK06WC090 | Includes factory-matched mounting bracket | Correct W.C. (water column) rating calibrated for the GB1AAV060090AAJA inducer assembly | Single-port pressure switch
• OEM vs Generic: This OEM switch is factory-calibrated to the exact W.C. trip point required by the Carrier GB1AAV060090AAJA. Aftermarket pressure switches frequently carry incorrect W.C. ratings that cause nuisance lockouts or, worse, allow ignition under unsafe venting conditions.
• Install difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, and a digital manometer to verify hose integrity post-install. Inspect the rubber vacuum hose for cracks or blockage before replacing the switch, as a collapsed hose is a frequent misdiagnosis.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier GB1AAV060090AAJA gas furnace. Verify your existing part number (HK06WC090) on the switch body or your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping on all in-stock orders.