OEM Carrier Pressure Switch w/ Bracket (HK06WC090) for Model GB3AAV036070AFJA

This is the factory-specified OEM pressure switch with bracket for the Carrier GB3AAV036070AFJA gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to confirm safe venting conditions before allowing ignition to proceed. When this switch fails or sticks, the furnace control board cannot verify that the inducer is operating correctly, resulting in a no-heat lockout condition — often before the igniter ever glows. Common symptoms include the furnace cycling the inducer repeatedly without progressing to ignition, or a fault code indicating an open or stuck pressure switch.

• Specs: OEM Part Number HK06WC090 | Includes factory mounting bracket | Rated water column (W.C.) pressure matched to GB3AAV036070AFJA inducer output | Single-port diaphragm-style switch
• OEM vs Generic: This OEM switch is factory-calibrated to the precise W.C. rating required by the GB3AAV036070AFJA control board. Generic substitutes frequently use wider pressure tolerances, causing nuisance lockouts or — more dangerously — allowing ignition under unsafe venting conditions.
• Install Difficulty: 2/5 — Power down the furnace and confirm inducer is off before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, and a digital manometer to verify switch operation after install. Photograph hose routing and wiring before disconnecting anything.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier GB3AAV036070AFJA gas furnace. Verify your existing switch part number matches HK06WC090 before ordering — W.C. rating variations exist across the GB3AAV product family. Our fitment team is available to confirm compatibility before you purchase. Order today and receive same-day shipping on in-stock OEM parts.