OEM Carrier Dual Pressure Switch Assembly HK06NB021 for Model PG95SAS60120DBAA

This OEM dual pressure switch assembly is the factory-specified replacement for the Carrier PG95SAS60120DBAA 95% AFUE gas furnace. The pressure switch is a critical safety device that monitors the negative pressure (vacuum) created by the inducer draft motor before allowing the ignition sequence to proceed. When either switch in the assembly fails, the furnace control board will lock out — typically before the igniter ever fires — leaving you with no heat. Common failure symptoms include a flashing error code indicating a pressure switch fault, an inducer motor that runs but the furnace never advances to ignition, or a furnace that intermittently lights and then locks out after repeated attempts.

• Specs: Dual pressure switch assembly | Two switches included, each with one hose port and two wire terminals | OEM part number HK06NB021 (superseded by HK06MB021) | Secondary part number HK02LB008 (gas pressure switch in assembly)
• OEM vs Generic: This OEM assembly is factory-calibrated to the exact water-column (W.C.) opening and closing set points required by the PG95SAS60120DBAA. Aftermarket switches often carry wider tolerances that can cause nuisance lockouts or, worse, fail to detect a true venting fault — a potential safety hazard.
• Install difficulty: 2/5 — Power down the furnace at the disconnect before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, and a manometer or magnehelic gauge (optional but recommended to verify W.C. after install). Photograph all hose and wire connections before removing the old assembly. Swap hoses and wires one at a time to avoid mix-ups.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Engineered as a direct OEM replacement for Carrier PG95SAS60120DBAA 95% AFUE packaged gas furnaces. Also replaces superseded part numbers HK06NB021 and HK02LB008. Verify your existing switch hose port count and wire terminal configuration against your unit's wiring diagram before installing. Questions about fitment? Our HVAC parts specialists verify compatibility before every order — contact us today and ship the same day.