OEM Carrier Dual Pressure Switch Assembly HK06NB023 for Model PG9UAA060100AASA

This OEM dual pressure switch assembly is the factory-specified replacement for the Carrier PG9UAA060100AASA two-stage gas furnace. The pressure switch monitors negative pressure (draft) generated by the inducer motor to confirm safe combustion venting before allowing the gas valve to open. On a two-stage furnace like the PG9UAA060100AASA, a dual pressure switch monitors both the low-fire (Stage 1) and high-fire (Stage 2) inducer pressure levels independently. When it fails, the furnace will lock out before ignition — often flashing a fault code for "pressure switch stuck open" — leaving you with no heat.

• Specs: Dual pressure switch assembly | Stage 1: –0.81" W.C. | Stage 2: –1.60" W.C. (min) / –1.81" W.C. (max) | Replaces OEM part numbers HK06NB023, HK06MB023, 319893-401, 319893-402, 325381-401
• OEM vs Generic: OEM pressure switches are factory-calibrated to exact W.C. ratings for your specific inducer and heat exchanger configuration. Off-spec generic switches can trip prematurely or fail to prove draft, leading to repeated lockouts and potential heat exchanger stress.
• Install difficulty: 2/5 — Power down the furnace and disconnect the hose(s) from the old switch. Label wires before removing. Tools needed: flat-head screwdriver, needle-nose pliers, and a manometer (optional, for verification). Typical job time: 15–30 minutes.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG9UAA060100AASA two-stage 96% AFUE gas furnace. Also fits select Bryant and Payne units sharing the same platform — verify your model's W.C. rating on the data plate before ordering. Our fitment team is available to confirm compatibility before you buy. Order today and receive fast, same-day shipping.