The hydrowave washer is totally different than the regular GE & Hotpoint front serviceable washer. It looks the same but that as close that it gets.
This washer is controlled by an electronic timer and an electronic motor. They are hard to diagnose because the problems could be the timer or the motor or both.
I don’t have much information on this washers because I really don’t work on them. Here are a few links to some videos that may help you, after those links I have nothing else ok.