jandy lite 2

I have a well maintained but older laars Jandy lite 2 NG heater. I need replacement new or used for the heater control assembly R0366200. I have looked low and high and the one or two that may be in stock around $500. I have gone through the diagnostics from the manual and all voltages etc check...

Got a Jandy Lite 2 here. There's a leak somewhere in the back-right this thing after the winter, from my reading it sounds like it's probably something relatively painless to fix... however, I've got it halfway apart to discover a lot of green buildup on the heat exchanger fins. Can this be...