OEM Carrier Dual Pressure Switch Assembly HK06NB021 for Model PG95XAT66120DBAA

This OEM dual pressure switch assembly is the factory-specified replacement part for the Carrier PG95XAT66120DBAA 95% AFUE, two-stage gas furnace. The pressure switch monitors negative air pressure created by the inducer motor to confirm proper combustion airflow before the control board allows ignition to proceed. When either switch fails — due to a ruptured diaphragm, clogged port, or faulty hose connection — the furnace will lock out on a pressure switch fault code before the ignition sequence can begin, leaving you with no heat. Replacing it with the correct OEM part (HK06NB021) restores the precise trip-point calibration the factory control board expects.

• Specs: Dual pressure switch assembly | OEM Part No. HK06NB021 | Factory-calibrated trip points for high-efficiency induced-draft operation | Designed for two-stage, 120,000 BTU input configuration
• OEM vs Generic: OEM pressure switches are calibrated to exact water-column (W.C.) specifications for the PG95XAT66120DBAA. Generic aftermarket switches frequently carry wider tolerances, risking nuisance lockouts or — more dangerously — failure to detect a true blocked-flue condition.
• Install Difficulty: 2/5 — Straightforward swap with basic hand tools. Recommended tools: 1/4" nut driver, flathead screwdriver, and a manometer to verify W.C. trip point post-installation. Always confirm inducer hose condition and condensate drain are clear before replacing the switch.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PG95XAT66120DBAA packaged gas furnace. Always cross-reference the part number on your existing switch and the unit data plate before ordering. Our fitment team is available to confirm compatibility — contact us before you buy if you have any questions.