When performing a boiler pilot assembly replacement

the 243-12 series is compatible with natural gas and propane applications

excessive resistance from frozen linkages or damaged seals can prevent the square shaft from turning

which will not engage 24V gas valves or control boards

Integrated Relay and Sensor: Combines a 5A rated command relay and an adjustable status sensor in a single housing to save enclosure space

Modine 3H1009790003 Sensor 320819-301 When performing a boiler pilotThe Modine 3H1009790003 Sensor is a critical moisture detection component engineered for industrial HVAC water damage prevention. As a precision calibrated Modine flood sensor, this device provides instantaneous continuity signals to the primary controller upon detecting liquid accumulation, facilitating an immediate HVAC system shutdown. Designed for low profile integration within secondary drain pans or unit heater chassis, it acts as a fail safe