How to Troubleshoot & Replace Whirlpool AP7205486 / W11629974 Ice Level Control Board

I had a kink in the 1/4 water line. I convinced myself that I had a supply problem, so fixed the line and installed a new water valve while I was at it. After thawing everything with a heat gun, I convinced myself that the ice maker main unit was bad. I bought a new unit and rather easily replaced it. Still nothing. Then I watched one of your videos and suspected the only remaining part of the whole system, the ice level power control board kit. It was pretty expensive at some $225, but by this time I didn't care. Your people sent the part very quickly and the install was ridiculously easy. The ice maker started working immediately. Who knew? 

Purchased the repair computer cards from Appliance Parts Pros and installed them. 

Replaced both circuit boards. 

Read the manual and diagnosed the problem was not due to a water flow issue but a defective optic sensor system. To test if my theory was on point, ordered a very inexpensive clone of these two parts and ice production began but surmised that this part would not last and not all problems would be resolved, namely the control of volume of ice production. Subsequently ordered the part from APP and it successfully resolved the problem. I'm a recent widow whose late husband loved to repair gadgets. I've never fixed anything but learned from watching him do a systematic diagnosis and isolate the fault, then do the necessary rework to eliminate the problem. 

Thinking the water fill valve was malfunctioning so I first replaced it. No water leaks occurred after but the ice maker still didn't work. I then took the ice maker on-off switch apart and found ice buildup on the circuit board, so I ordered a new control board and replaced it. It's working now! 

Replaced the Ice Maker which may have not been the problem. It made four batches and quit. I contacted PartsPros via their question section. I learned that there may be a 'troubleshooting guide' on the back of the appliance. Sure enough, there was. It gave steps in checking the light sensor system on the side of the freezer that lines up with the ice bucket. The red light was flashing two pulses at a time. Close the flapper door on the other side and it still flashed. This indicated by the guide the sensor system was bad. PartsPros confirmed that. Ordered the two boards, replaced them. The unit is working normally with lots of ice. The part that hurt was nearly $500 in parts for frozen water! But a service call, troubleshooting, and parts would probably have been the same. Or a new appliance for $1,500. Decisions, decisions. PartsPros is a good site for the handyman types. Thanks for the help. Love the video instructions. 

Sensor was not working so ordered a new sensor board. Very easy replacement and icemaker worked immediately. 

TURNED FRIDGE BREAKER OFF. REPLACED SENSOR ICE LEVEL PCB EMITTER - RECEIVER. TURNED BREAKER ON. CYCLED 3X THE DOOR SW , LED STAYED IN THE HARVEST MODE STEADY ON . TWO DAYS LATER ICE BIN WAS LOADED TO MAX . 

I watched two videos on the symptoms and ordered the parts. The videos were helpful and easy to follow. 

I watched the video on your website and ordered the sensors to repair. We followed your instructions and it works perfectly now.