OEM Carrier Dual Pressure Switch Assembly HK06NB021 for Model PG96VAT66120DCAA

This OEM dual pressure switch assembly is the factory-specified replacement for the Carrier PG96VAT66120DCAA 96% AFUE variable-speed gas furnace. The pressure switch is a critical safety component that monitors the inducer motor's vacuum to confirm proper draft before allowing the ignition sequence to proceed. When either switch fails, the furnace control board will lock out the heating cycle — leaving you with a no-heat condition, a flashing fault code, or a furnace that starts the inducer but never advances to ignition.

• Specs: Dual pressure switch assembly | Two independent switch bodies included | Each switch features 2 wire terminals and 1 hose port | OEM part number HK06NB021 (current superseded replacement: HK06MB021) | Factory-calibrated set points for the PG96VAT66120DCAA inducer
• OEM vs Generic: OEM switches are calibrated to the exact water-column (W.C.) trip points required by the Carrier PG96VAT66120DCAA. Aftermarket switches can carry wider tolerances, risking nuisance lockouts or — more dangerously — failure to detect a true draft fault.
• Install difficulty: 2/5 — Turn off gas and 120V power before servicing. Tools needed: 1/4" nut driver, flat-head screwdriver, and needle-nose pliers for hose clamps. Label all hose and wire connections with tape before removal. Snap a photo of the existing wiring for reference.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for Carrier model PG96VAT66120DCAA 96% AFUE packaged gas furnace. Also fits select Bryant and Payne models sharing the same dual pressure switch specification — verify your unit's data plate and existing hose-port count before ordering. Current superseded OEM part number is HK06MB021; both numbers reference the identical assembly. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — ships today.