this unit is a direct replacement that ensures the control board communication remains seamless

this unit integrates with standard AV-600 and AM-series linkages

Reliable 230V Operation: Designed for stable performance in 230V commercial and residential heating electrical circuits

as the HH19ZA940 is specifically tuned for systems requiring this exact 55-degree differential to maintain safe airflow cycles

adjust the pilot key behind the adjustment cap on the valve body

Trane SWT3179 Pressure Switch Kit Freon this unit is a directFor veteran HVAC contractors, the Trane SWT3179 Pressure Switch Kitwhich is functionally identical to the SWT03179is a critical component for restoring furnace ignition sequences. This 0. 8" WC setpoint switch is a Single Pole Double Throw (SPDT) configuration, making it highly versatile for monitoring induced draft blower performance and ensuring proper venting before the gas valve opens. Engineering wise, this OEM replacement part is built for snap