OEM Carrier Pressure Switch with Bracket for Model GB1AAV036045AFJA

This is the factory OEM pressure switch with mounting bracket (part number HK06WC090) for the Carrier GB1AAV036045AFJA gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails or becomes stuck open, the furnace control board will halt operation prior to ignition — resulting in a no-heat lockout condition, a flashing fault code, or continuous inducer motor operation with no flame.

• Specs: OEM pressure switch with factory-matched W.C. (water column) rating | Includes mounting bracket | Direct replacement for part number HK06WC090 | Rated for single-stage gas furnace draft proving duty
• OEM vs Generic: OEM pressure switches are calibrated to the exact W.C. threshold required by the furnace control board. Off-brand substitutes frequently carry ±15% tolerances, risking nuisance lockouts or — more dangerously — allowing ignition under inadequate draft 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). Photograph all hose and wiring connections before removal. The included bracket simplifies reinstallation to the original mounting position.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier GB1AAV036045AFJA gas furnace. Always verify the W.C. rating and port configuration on your existing switch against the data plate and wiring diagram located inside the furnace cabinet before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy.