How do I resolve a "Communication Failed" or "IO Board Reset" error

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Resideo L4006B1007 Aquastat Controller 340155-7026 How do I resolve aThe Resideo L4006B1007 Aquastat Controller is a professional grade immersion temperature controller designed specifically for circulator application in hydronic heating systems. This immersion device features a 3 8" x 2 7 8" copper bulb sensing element that provides precise thermal response for regulating or limiting the temperature of liquids in boilers and storage tanks. Configured with SPST contacts that make on temperature rise, the L4006B1007