OEM Carrier Dual Pressure Switch Assembly HK06NB012 for Model PG95XAT30040ABAA

This OEM Dual Pressure Switch Assembly (part # HK06NB012) is the factory-specified replacement for the Carrier PG95XAT30040ABAA 95% AFUE gas furnace. The dual pressure switch monitors the negative pressure (vacuum) produced by the inducer draft motor to confirm safe flue venting conditions before allowing ignition to proceed. When either switch fails — or inducer vacuum falls outside specification — the furnace control board receives no "proof" signal and locks out on a pressure switch fault code, leaving you with no heat. Common failure symptoms include a flashing fault code indicating an open pressure switch, the inducer running continuously with no ignition attempt, or intermittent lockouts during cold weather when vent restriction increases.

• Specs: Dual switch assembly | Low-pressure switch (LPS): 0.68" W.C. | Second switch: 0.34" W.C. | SPST normally open contacts | Two wire terminals and one hose port per switch | Factory-matched trip points
• OEM vs Generic: OEM switches are factory-calibrated to exact W.C. trip points for the PG95XAT30040ABAA. Aftermarket switches with loose tolerances can cause nuisance lockouts or — more dangerously — fail to detect a blocked flue, creating a carbon monoxide risk.
• Install difficulty: 2/5 — Shut off gas and 120V power before servicing. Tools needed: 1/4" and 5/16" nut drivers, flathead screwdriver, needle-nose pliers, manometer (recommended). Photograph all hose routing before disconnecting. Check rubber pressure hoses for cracks or blockages as a blocked hose is a common root cause of switch failure.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3PM local time.

Compatibility: Designed for the Carrier PG95XAT30040ABAA 95% AFUE packaged gas furnace. Also replaces cross-reference part numbers BA20266-2 and superseded OEM part HK06MB012. Always verify W.C. ratings on your unit's wiring diagram before ordering — incorrect switch trip points will cause persistent lockout faults. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.