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Honeywells9361a2076 or crown part#3505076 replacement

add Member Posts: 94
Hi everyone, being a oil service man for trade, I am curious on how to replace a Honeywell S 9361a2076 or # 3505076 called by crown (atmospheric gas boiler control). If I ever need to replace one, is there a well like the old aquastat, would I need to drain the unit or is as simple as a 1 2 3 like the old fashion aquastats ? I tried to find a video on you tube but i was unsuccessful maybe is a to new of a part?