While some gas valves allow for a manual reset sequence (cycling the temperature dial)

preventing the vibration issues often associated with generic multi-fit alternatives

reducing NOx emissions and improving combustion reliability

this module regulates the ignition sequence

or a furnace that fails to ignite because the pressure switch cannot detect sufficient draft

MARS 61624 Auxiliary Switch 322055-301 While some gas valves allowThe MARS 61624 Auxiliary Switch is a heavy duty, side mounted electrical component designed for seamless integration with MARS 780 series definite purpose contactors. Engineered for 75 90 amp applications, this 1 NO auxiliary contact provides a reliable secondary control circuit that activates precisely when the primary contactor coil is energized. As a veteran grade OEM HVAC replacement part, it ensures stable performance in demanding commercial