PCB Boards for Powerstar AE-115 & AE-125 Electric Tankless

Bosch has made many upgrades and improvements to the Bosch Powerstar AE-115 and Powerstar AE-125 electric tankless water heaters.  One of the main improvements is in the Printed Circuit Board (PCB) that basically controls the heater.  Below is a list of the older and newer Powerstar AE115 & AE125 PCB board part numbers and the cutoff dates.

Older Powerstar AE-115 & AE-125 with Copper Canisters and serial number BEFORE #59:
AE-115 PCB Board - #93-793777
AE-125 PCB Board - #93-793778

Powerstar AE-115 & AE-125 with Polymer Modules and serial number 60 through 107:
AE-115 PCB Board - #93-793843
AE-125 PCB Board - #93-793844

New Powerstar AE-115 & AE-125 with Polymer Modules and serial number 108 and above:
AE-115 PCB Board - #8738701732 (87387017320)
AE-125 PCB Board - #8738701738 (87387017380)