OEM Carrier Dual Pressure Switch Assembly HK06NB012 for Model PG92SAS30040AAAA

This OEM Carrier Dual Pressure Switch Assembly is the factory-specified replacement for the Carrier PG92SAS30040AAAA gas furnace. The pressure switch is a critical safety component that monitors the negative pressure (vacuum) created by the inducer motor during every heating cycle. If the inducer fails to reach proper speed — or if there is a flue blockage, cracked hose, or a failed switch diaphragm — the pressure switch will not close, preventing the furnace from advancing to the ignition stage. Common failure symptoms include the furnace cycling the inducer repeatedly without lighting, a blinking fault code indicating a pressure switch fault, or complete no-heat lockout. This assembly includes both the dual-stage air pressure switch (HK06NB012) and the gas pressure switch (HK02LB008) as factory-matched components.

• OEM Part Numbers: HK06NB012 (Dual Pressure Switch Assembly) | HK02LB008 (Gas Pressure Switch) | Superseded by HK06MB012
• OEM vs Generic: OEM switches are calibrated to exact W.C. (inches water column) setpoints required by your furnace's combustion design. Generic substitutes often carry wider tolerances, risking nuisance trips or — more dangerously — failure to trip on a genuine fault condition.
• Install Difficulty: 3/5 — Requires shutting off gas and power before servicing. Inspect all rubber hose connections and the condensate drain for blockages before replacing the switch. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, manometer (recommended for verification). Always clear any active fault codes after installation.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Factory-matched for the Carrier PG92SAS30040AAAA 92% AFUE packaged gas furnace. Cross-references to OEM part numbers HK06NB012, HK02LB008, and updated supersession HK06MB012. Verify your unit's data plate and existing switch W.C. rating before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — same-day shipping on all in-stock orders.