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the magnet is energized by millivoltage from a thermocouple
as this component is engineered to shut down the system in unsafe drafting conditions
the 8214G251-12VDC is the official manufacturer-designated direct replacement for the older 8214250CSA-12VDC version
the 100208174 switch sensor is likely compromised and requires replacement
Designed for conductive liquid level sensing
Johnson Controls M9203-BUB-2 Actuator 320788-702 the magnet is energized byThe Johnson Controls M9203 BUB 2 is a professional grade Spring Return Direct Coupled Actuator engineered for precision control in HVAC systems. Operating on a universal power supply of 85 264 VAC, this unit delivers a rated 27 lb in torque (3 Nm), making it an ideal solution for small to medium dampers and ball valve applications. Designed for two position control (on off), it features a mechanical spring return that ensures a fail safe position
