the sensing relay contacts are likely pitted or stuck

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What tools are needed for installation

and VCZMS6100/U valve bodies

Honeywell T775B2016 Temperature Controller Els PW 29614 the sensing relay contacts areThe Honeywell T775B2016 is a robust, stand alone electronic remote temperature controller designed for precision in demanding HVACR applications. Engineered with a NEMA 4X enclosure, this unit is built to withstand moisture and corrosion, making it ideal for agricultural, industrial, and commercial settings. It features dual SPDT relay outputs and a dedicated floating output, providing versatile control for valves and dampers. With a setpoint