causing intermittent "Limit Switch Open" error codes (typically 4 or 11 red flashes) and premature system shutdowns

Check your unit's data plate

It is specifically engineered to repair and restore centrifugal pump efficiency in Series S & H circulators and Series 1060 pump models

this L150-30F blower temperature switch is designed to monitor and regulate internal temperatures

and counter-clockwise decreases it

Maxon 1072451 Plug 340155-7026 causing intermittent "Limit Switch Open"The Maxon 1072451 Igniter Spark Plug is a critical industrial combustion component designed for high performance ignition in Maxon burner assemblies and heavy duty furnaces. Engineering grade materials allow this industrial spark ignitor to withstand the extreme thermal cycling and high pressure environments common in process heating applications. Pro tier construction ensures a consistent and powerful electrical arc, which is vital for maintaining