MAH3000AWW Tumbles, no spin

[flyn4cents]

I have an early Neptune that will spin one out of 20 times.  I have ran the motor control test,and the motor and motor control board pass the basic test found in the manual. I have replaced the machine control board.  I have tested the balance switches(3) and replaced the inertial imbalance switch just in case it was bad. Finding no bad switches I replaced the machine control board since I have all indications that the wax motor is working.  The door locks and the door lock light illuminates.  I will replace the wax motor next just in case. I think the wax motor is the new design with the black plunger. My brother had replaced it earlier before he was sick of messing with this unit and gave it to me.

Model MAH3000AWW

[flyn4cents]

Forgot my question..... HELP, Any other ideas as to why it will not do more than tumble.  What am I missing? 

[Repair-man]

Sounds like a timer problem or a failing motor control board. You'll have to whip out the tech sheet from in the console to check the  timer input/output circuits during  spin, as they must communicate with the machine control to achieve the  hi-speed spin. Otherwise, it will simply tumble back and forth.

Basically, this boils down to a bad timer or more likely a bad motor control board. It is possible to determine which if you are good with a meter.