Carrier HK06MB026 Pressure Switch

The Carrier HK06MB026 Pressure Switch is the direct engineering successor to the HK06NA018, primarily utilized in high-efficiency Carrier, Bryant, and Payne gas furnaces. As a Factory Authorized Part (FAP), this replacement ensures seamless integration with the inducer motor assembly to verify proper venting and combustion airflow. Designed for 24V control circuits, this differential air pressure switch is calibrated to respond to specific water column (WC) thresholds—typically around -2.11" WC transition and -1.38" WC blower—triggering the safety lockout if the draft remains insufficient.

Built with a durable polycarbonate housing and a precision-engineered diaphragm, the HK06MB026 is rated for operating temperatures from -40°F to 190°F. When troubleshooting Carrier furnace error code 31 or short cycling, this OEM replacement part provides the exact electrical continuity and cut-in/cut-out resistance needed to restore HVAC system safety without the reliability issues common to universal alternatives. This dual air pressure switch features quick-connect terminals and standard hose porting for straightforward field installation.

• OEM Compatibility: Serves as the official direct replacement for HK06NA018, maintaining factory safety protocols.
• High Precision Monitoring: Accurately senses differential pressure to ensure the inducer motor is exhausting flue gases safely.
• Rugged Construction: Specifically designed to withstand the high-heat and moisture conditions of condensing furnaces.
• Critical Safety Lockout: Prevents gas valve ignition if venting restrictions or blocked drains are detected.

Is the HK06MB026 a direct drop-in for the HK06NA018?
Yes, this is the upgraded factory replacement for the discontinued HK06NA018. It matches the mounting footprint and electrical specifications of the original part.

What causes this switch to trip frequently?
Outside of a faulty switch, common triggers include clogged condensate drains, water in the inducer housing, cracked pressure tubing, or flue obstructions that prevent the switch from closing.

Does this switch require specific mounting orientation?
To avoid diaphragm fatigue and ensure accurate WC readings, professional technicians recommend following the vertical mounting orientation indicated by the manufacturer.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.