OEM Carrier Pressure Switch with Bracket (.33 WC) for Model PG8UAA066111ABJA — Part# HK06WC090

This is the genuine OEM replacement pressure switch with integrated mounting bracket for the Carrier PG8UAA066111ABJA gas furnace. The pressure switch is a critical safety component that monitors negative air pressure created by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails — or becomes stuck open or closed — the furnace control board interprets an unsafe venting condition and locks out the heating cycle entirely, leaving you with no heat. Common symptoms include the inducer motor running continuously with no ignition, a flashing fault code for pressure switch failure, or a furnace that shuts down immediately after the call for heat begins.

• Specs: -0.33 in. W.C. (water column) set point | Includes factory mounting bracket | SPST normally-open configuration | Direct factory-matched replacement for Carrier OEM part# HK06WC090
• OEM vs Generic: This is a genuine Carrier OEM switch — not an aftermarket clone. OEM switches are calibrated to the exact W.C. rating required by your furnace's control board; off-spec generic switches can trip too early or too late, causing nuisance lockouts or unsafe operation.
• Install Difficulty: 2/5 — Straightforward swap with basic hand tools. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers. Always shut off gas and 120V power at the disconnect before servicing. Disconnect the hose port and two wire terminals, unbolt the bracket, reverse for installation. Inspect the hose tubing for cracks or blockages before reinstalling.
• Warranty: 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse when ordered before cutoff.

Compatibility: Confirmed fit for Carrier model PG8UAA066111ABJA gas furnace. This part also supersedes and replaces legacy part numbers including HK06WC088, HK06WC086, HK06WC076, HK06WC072, HK06WC073, HK06WC074, HK660001, 310315-751, 310315-752, and 326750-751. Always verify the W.C. rating on your existing switch before ordering. Order today and our HVAC parts specialists will confirm fitment before your package ships.