OEM Carrier Pressure Switch with Bracket for Model GB1AAV048110AAJA (HK06WC090)

This is the factory OEM replacement pressure switch with mounting bracket for the Carrier GB1AAV048110AAJA 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 control board cannot verify inducer operation, resulting in a hard lockout — the furnace will attempt to start, fail to prove the inducer, and shut down without ever reaching ignition. Common symptoms include a blinking fault code indicating "pressure switch open" or the furnace cycling the inducer repeatedly without progressing to heat.

• Specs: OEM part number HK06WC090 | Includes factory mounting bracket | Calibrated water column (W.C.) rating matched to Carrier GB1AAV048110AAJA inducer specifications | Single-port pressure switch design
• OEM vs Generic: This is a genuine Carrier OEM part, factory-calibrated to the exact W.C. trip point required for your furnace. Aftermarket pressure switches frequently use incorrect W.C. ratings, causing nuisance lockouts or — more dangerously — failing to detect true venting problems. OEM is always the recommended choice for pressure switches.
• Install difficulty: 3/5 — Shut off gas and power before servicing. Tools needed: Phillips and flathead screwdrivers, 1/4" nut driver, manometer (recommended for verification). Inspect the rubber hose and hose port for cracks or blockages before condemning the switch — a clogged hose is a frequent cause of pressure switch faults. Photograph all hose connections before removal.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed and factory-calibrated for the Carrier GB1AAV048110AAJA gas furnace. Always cross-reference OEM part number HK06WC090 and verify your existing switch's W.C. rating on the data plate or switch body before ordering. Our HVAC parts specialists are available to confirm fitment prior to purchase — reach out before you order if you have any questions.