OEM Carrier Dual Pressure Switch HK06NB020 for Model PG96VAT48080BBAA

This OEM dual pressure switch assembly (part number HK06NB020) is the factory-specified replacement for the Carrier PG96VAT48080BBAA 96% AFUE gas furnace. The pressure switch is a critical safety component that monitors negative pressure created by the inducer motor to confirm proper draft before allowing the ignition sequence to proceed. When this switch fails — whether it sticks open, sticks closed, or develops a hairline crack in its diaphragm — the control board receives no proof-of-draft signal, triggering a safety lockout and leaving you with no heat. Common symptoms include the inducer motor running normally but the furnace never advancing to ignition, a flashing fault code on the control board indicating a pressure switch fault, or the furnace short-cycling immediately after startup.

• Part Specs: Dual pressure switch assembly | OEM part number HK06NB020 | Factory-matched W.C. (water column) rating | Direct fit for Carrier PG96VAT48080BBAA 96% AFUE furnace — no modifications required
• OEM vs Generic: This is a genuine OEM Carrier assembly engineered to exact W.C. trip-point tolerances. Aftermarket pressure switches frequently use wider-tolerance diaphragms that can cause nuisance lockouts or — more dangerously — fail to detect a true draft loss, compromising furnace safety.
• Install Difficulty: 3/5 — Shut off gas and power before beginning. Tools needed: ¼" nut driver, flathead screwdriver, needle-nose pliers, and a manometer or magnehelic gauge to verify W.C. rating on the replacement. Photograph all hose and wiring connections before disconnecting. Check inducer housing, hose barbs, and drain tubes for cracks or blockages while the switch is out.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier PG96VAT48080BBAA 96% AFUE, two-stage gas furnace. Always cross-reference the W.C. rating stamped on your existing switch with the replacement before installation. Note that OEM part HK06NB020 has been superseded — the current shipping equivalent may carry a revised part number but is fully backward-compatible. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — call or chat now.