A: This is a 6mm x 6mm square shaft designed to fit standard 6mm handle openings

What is the maximum ambient temperature for the control housing

Will this work on smaller threaded V5011 valves

providing a more robust power supply for your controls

Heatcraft Refrigeration 28910104 Control Board 323269-701 A: This is a 6mmThe Heatcraft Refrigeration 28910104 Control Board is a critical replacement component designed for Quick Response Controller (QRC) systems. This QRC Ctrl Board features V4. 4 Firmware, offering enhanced logic for demand defrost cycles and precise evaporator fan management. Engineered for high stakes commercial refrigeration maintenance, this board optimizes system efficiency by monitoring ambient and coil temperatures to prevent unnecessary energy