OEM Carrier Dual Pressure Switch HK06NB020 for Model PG92SBS30040ABAA

This OEM dual pressure switch assembly is the factory-specified replacement for the Carrier PG92SBS30040ABAA 92% AFUE gas furnace. The pressure switch monitors negative air pressure created by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. When it fails or sticks open, the furnace control board detects an unsafe condition and locks out — resulting in a no-heat call with no ignition attempt. A faulty pressure switch is one of the most common causes of furnace lockout codes on high-efficiency Carrier units.

• Specs: Dual pressure switch assembly | Carrier OEM Part# HK06NB020 (superseded by HK06MB020) | Also cross-references HK02LB008 gas pressure switch | Factory water column (W.C.) rating matched to the PG92SBS30040ABAA inducer assembly
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact W.C. trip-point tolerances. Aftermarket switches with imprecise W.C. ratings can cause nuisance lockouts or — more dangerously — allow ignition under unsafe venting conditions.
• Install difficulty: 3/5 — Shut off gas supply and 120V power before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, manometer (recommended for W.C. verification), and digital multimeter. Photograph all tubing connections before removal. Verify hose barb orientation matches original switch.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG92SBS30040ABAA 92% AFUE single-stage gas furnace. Cross-references OEM part numbers HK06NB020, HK06MB020 (direct OEM successor), and HK02LB008. Always confirm the W.C. rating on your existing switch's label before ordering. Our team is available to verify fitment — contact us before you buy.