Product review (2 stars): Fixed shifter fault; high failure rate when exposed to contaminants
Our Whirlpool washer recently developed a problem with spin cycles, so the clothes came out looking very wet. The service mode displayed errors F7 E5 (shifter actuator fault) and F7 E1 (basket speed sensor fault). Sometimes the actuator could be heard hunting back and forth at the start of a wash cycle. I removed the actuator assembly for inspection and found two broken PC board traces which affected the shift sensor circuit. They were corroded due to the presence of an unknown contaminant. I bridged the broken traces using insulated 30 gauge wire (soldered to component leads at the endpoints of the traces) and reinstalled the actuator assembly into the washer. Everything worked fine after the repairs, so the source of the problem was identified and fixed. A new W10006355 actuator assembly was later installed since the repair was considered temporary. The replacement actuator works well, and the new PC board has a protective coating which should offer some protection against corrosion. The washer operates like new again, so we are happy with the results.

UPDATE 1: Five months after the repair, the replacement actuator has also failed with the same symptoms. Upon disassembly, I discovered that one of the two previously corroded PCB traces was corroded as well, breaking the shift sensor circuit. What is going on here? I'm guessing that the speed sensor opening below the basket is leaking a small amount of fluid onto the actuator PCB and causing the corrosion. The corroded traces on the lower edge of the board are very narrow, so it doesn't take very long for them to disintegrate when exposed to contaminants. The splash shield that is supposed to protect the board from fluids is apparently not sufficient. I bridged the narrow traces with 30 gauge insulated wire as before, and drilled small drainage holes in the plastic housing at the board insertion point where the corrosion occurs, so hopefully that will delay the next failure. I duplicated the modifications on the original actuator assembly, so now I have a spare. If both of those fail, it's time for a new washer.

UPDATE 2:  A year after the initial repair, I discovered fluid dripping from the actuator assembly. The tub seal is leaking.  Since the basket is now making creaking noises during rotation, the transmission and seal would need to be replaced at great expense.  It's time for a new washer.  Everyone in our family is happy with that decision.