OEM Carrier Dual Pressure Switch Assembly HK06NB020 for Model PG92SBS30040AAAA

This OEM Carrier Dual Pressure Switch Assembly (part number HK06NB020, also cross-referenced as HK02LB008) is the factory-specified replacement for the Carrier PG92SBS30040AAAA 92% AFUE gas furnace. The pressure switch monitors negative pressure produced by the inducer motor to confirm proper draft before allowing the ignition sequence to proceed. When it fails — or when tubing cracks and leaks — the furnace control board detects an open switch circuit and locks out the heat call, leaving you with a cold house and a blinking fault code. Common symptoms include no heat, inducer runs but furnace never lights, or a pressure-switch fault code on the control board.

• OEM Part Numbers: HK06NB020 (Dual Pressure Switch Assembly) | HK02LB008 (Gas Pressure Switch) — both cross-reference to this assembly for the PG92SBS30040AAAA platform
• OEM vs Generic: OEM pressure switches are factory-calibrated to exact W.C. (inches water column) ratings. Off-brand switches frequently drift outside tolerance, causing nuisance lockouts or, worse, allowing ignition under unsafe draft conditions. Always use OEM on 90%+ efficiency condensing furnaces.
• Install Difficulty: 3/5 — Requires shutting off gas and power before servicing. Tools needed: Phillips and flathead screwdrivers, 1/4" nut driver, needle-nose pliers, manometer (recommended for verification). Inspect all rubber pressure tubing for cracks before condemning the switch — a split hose is the #1 misdiagnosis.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for Carrier PG92SBS30040AAAA gas furnaces. Cross-references to successor part HK06MB020 where applicable. Always verify your unit's data plate and existing switch W.C. rating before ordering. Our parts specialists are available to confirm fitment — just reach out before you order. In stock — order today for same-day shipping.