OEM Carrier Dual Pressure Switch Assembly HK06NB020 for Model PG92SCS48080BAAA

This OEM Dual Pressure Switch Assembly (part number HK06NB020, superseded by HK06MB020) is the factory-specified replacement for the Carrier PG92SCS48080BAAA 92% AFUE gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to verify safe venting conditions before the ignition sequence is allowed to proceed. When this switch fails or sticks open, the control board cannot confirm proper draft, causing the furnace to lock out before a flame is ever established — leaving you with no heat. A faulty pressure switch is one of the most common causes of a furnace that runs the inducer but never ignites.

• OEM Part Numbers: Primary — HK06NB020 (Dual Pressure Switch Assembly) | Secondary — HK02LB008 (Gas Pressure Switch) | Current OEM Replacement: HK06MB020
• OEM vs Generic: This is a genuine Carrier OEM assembly, factory-calibrated to the precise water column (W.C.) rating required by the PG92SCS48080BAAA. Generic switches often carry wider W.C. tolerances, risking nuisance lockouts or, worse, allowing ignition under unsafe venting conditions.
• Install Difficulty: 3/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, manometer (recommended to verify W.C. after install). Disconnect the two low-voltage wires and rubber hose port, swap the switch, and re-verify operation through a full heat call cycle.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG92SCS48080BAAA 92% AFUE packaged gas furnace. This assembly replaces both the HK06NB020 Dual Pressure Switch and the HK02LB008 Gas Pressure Switch on applicable configurations. Always verify the W.C. rating on your existing switch label before ordering. Our fitment team is available to confirm compatibility — reach out before you buy.