OEM Carrier Dual Pressure Switch Assembly w/Bracket HK06NB017 for Model PG9UAA042060AASA

This is the factory OEM dual pressure switch assembly for the Carrier PG9UAA042060AASA two-stage gas furnace. The pressure switch monitors negative pressure (inches of water column) produced by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. Because this unit uses a dual-switch assembly, it verifies both low-fire and high-fire inducer operation independently. When either switch fails or becomes stuck, the furnace control board will lock out the heating sequence — typically displaying a fault code — before a single ignition attempt is made. Common symptoms include a furnace that runs the inducer but never advances to ignition, repeated short-cycling, or a diagnostic LED indicating a pressure switch fault.

• OEM Part Number: HK06NB017 | Honeywell cross-reference: BA20203 | Includes factory mounting bracket for direct bolt-in replacement
• OEM vs Generic: This is a genuine Carrier factory part, manufactured to exact water-column (W.C.) set-point specifications. Aftermarket pressure switches often carry wider tolerances that can cause nuisance trips or fail to prove inducer operation at the correct threshold, leading to repeated lockouts.
• Install Difficulty: 3/5 — Disconnect power and gas before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers. Label and photograph all hose and wire connections before removal. Verify all rubber tubing is free of cracks or blockages before installing the new switch — a clogged hose is a leading cause of repeat pressure switch failure.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PG9UAA042060AASA two-stage gas furnace. Also fits select Bryant and Payne models sharing the same dual pressure switch specification — verify your unit's existing W.C. rating on the data plate or original switch label before ordering. Our team is available to confirm fitment before you buy.