OEM Carrier Pressure Switch with Bracket for Model GB3AAV048115AEJA — Part# HK06WC090

This is the factory OEM replacement pressure switch with integrated mounting bracket for the Carrier GB3AAV048115AEJA 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 the switch fails, the control board cannot verify that the inducer is operating correctly, causing the furnace to lock out prior to ignition — leaving you with no heat. Common symptoms include a furnace that attempts to start but shuts down immediately, a flashing fault code indicating a pressure switch error, or a furnace that runs the inducer but never advances to the ignition stage.

• Specs: OEM-rated water column (W.C.) pressure setting factory-matched to the GB3AAV048115AEJA inducer assembly | Includes factory mounting bracket for direct drop-in installation | Rated for single-stage gas furnace operation | Meets original Carrier tolerance specifications
• OEM vs Generic: OEM pressure switches use factory-calibrated diaphragms that trip at the precise W.C. rating engineered for your furnace. Generic switches often carry wider tolerance ranges that can cause nuisance lockouts or, more dangerously, fail to detect a true venting problem — a critical safety concern.
• Install difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, and a manometer if verifying W.C. rating post-install. Photograph the hose port and wiring connections before removal. The included bracket simplifies reinstallation to factory position.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier GB3AAV048115AEJA 4-ton, 115,000 BTU gas furnace. Always cross-reference part number HK06WC090 against your unit's data plate before ordering. Our fitment team is available to verify compatibility before you purchase — ensuring you get the right part the first time. Order today and receive same-day shipping on all in-stock OEM components.