Thanks Mike.
Should have thought to add the model number. The label is a bit warn out in the picture. I believe it is DBW 2010.74, 24V/60W, 132kW.
High temperature sensor is a good start. I just need to locate it. I don’t have schematics of the unit but I am sure can find it online somewhere. I know of the flame sensor. High temperature sensor makes sense as it runs well when it is cold outside.
Will try that out.
Regards, Shahzad Lateef
2003 Marathon H3-45, DS
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