I went to turn on our heater for the first time since last winter and nothing happened. The heater never tried to fire up and the display still says the heater is in standby mode and does not give any diagnostic codes or errors. Upon further inspection, at some point this summer the kepyad cover on the heater had peeled away and was open for water to enter the keypad and reach the display board. The display still powers up but there are several burnt elements on the display board. When I removed the display board connector from the IC board there was corrosion on the female piece that is soldered in to the IC board. The rest of the board looks fine.
If we're using a Pro-Logic controller to bypass the on-unit keypad, would the display board being bad keep the unit from attempting to turn on or is the IC board likely bad as well? Trying to decide what I need to purchase. Thanks for any insight you can provide.