How to Troubleshoot & Replace Whirlpool AP6007128 / WP2304016 Control Board

Ordered new circuit board and water pump. Hired a professional to install them 

I tried the easy electrical fixes-testing the evaporator thermister and the ice bin thermister. Evaporator one was bad, so I replaced it. Icemaker made ice like a champ but still shut down after the bin was full and would not come back on. The control board was the only thing left to replace in the electronics. Getting to the board was pretty easy-I had disassembly instructions here for my model-- http://www.truetex.com/ice_machine_gi1500.pdf Getting the control box cover off was easy. Getting it back on was the hardest part of the entire process because of trouble getting the screws to line up. Once I got one screw on in the back, the rest fell into place pretty easily. The machine now makes ice great and shuts down when the bin is full like it should. More importantly, it now starts right back up when the ice bin thermister tells it to. Overall, I am very pleased. Not the easiest job in the world, but it's completely doable if you follow the directions. Having the schematic was very helpful. 

Originally I thought it was a Freon gas leak as the ice quantity and size diminished over two days. I installed a tap in the suction line to be able to re-charge and find the leak (happened to previous ice maker) but couldn't find a leak using a sniffer. Then I noticed the panel lights did not turn on. Control board replacement time. I replaced the control board by removing the top (4 screws) and then the cover of the control board (3 screws) changed to new board and recharged the Freon 11, The hard part was determining the proper charge of Freon. I found that 26 psi during the freeze cycle produced the best cubes. Would you like the failed board back?? John Martin 

First, bought the switch, which was not the problem, then ordered the control board, which has the relay for the pump, which was failing to start. I bench tested the pump to confirm it was not the problem. The control board replacement solved the problem and now the unit is performing as expected. 

Replaced control board. 

The plug that the pump plugs into had a pin missing. Replaced pump plug harness. Unit must be disassembled to replace this harness. Great experience with ordering parts online and service from appliance parts pros. 

My appliance is 8 yrs old....the compressor fan stopped working so initially I replaced the compressor fan motor. This did not fix the issue, which led me to the control board. Over time, the solder joints must have overheated and the fan was not getting the proper 120 volts. This was a simple fix to swap out the old control boards. The most time-consuming part of the process was learning how the ice machine worked. I most likely saved myself several hundred dollars of labor charges via a repair man! 

Ordered new part fromappliancepartspros.com and repairman installed new parts the next day. 

New control board and new in-line fuse.