OEM Carrier Dual Pressure Switch 0.80/1.70" W.C. for Model PG9YAB036080AAAA

This OEM dual pressure switch assembly (part # HK06NA016) is the factory-specified replacement for the Carrier PG9YAB036080AAAA 2-stage gas furnace. The pressure switch is a critical safety component designed to prove that the draft inducer motor is spinning at the correct RPM and generating sufficient negative pressure before allowing the furnace to proceed through the ignition sequence. When this switch fails or sticks open, the inducer will run continuously but the burners will never fire — leaving you with a furnace stuck in a safety lockout with no heat. This assembly includes two individual switches mounted on a factory bracket, covering both the low-stage (0.80" W.C.) and high-stage (1.70" W.C.) proving circuits required by the 2-stage combustion design.

• Specs: Dual-switch assembly | Stage 1: –0.80" W.C. | Stage 2: –1.70" W.C. | Mounted on Honeywell 27555BM-01 bracket | Honeywell cross-reference: BA20238 | OEM part number: HK06NA016 (superseded by HK06MB025)
• OEM vs Generic: This is a genuine OEM-spec assembly with factory-calibrated switching points. Aftermarket substitutes frequently use imprecise trip points that cause nuisance lockouts or, worse, fail to detect a true flue blockage — a serious safety risk on any gas furnace.
• Install difficulty: 2/5 — Power and gas must be off before starting. Tools needed: flat-head screwdriver, needle-nose pliers. Photograph hose and wiring routing before disconnecting. Remove bracket as a complete assembly; swap hoses and wires one at a time to avoid miswiring the stage-1 and stage-2 circuits.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PG9YAB036080AAAA 2-stage gas furnace, and cross-references to additional Carrier, Bryant, and Payne 80% 2-stage furnace models. Always verify the W.C. ratings on your existing switch label before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy — order today and get it shipped the same day.