[LMP]

Control On does not have any effect. Replaced CCU and machine started. I hit pause button two times as instructed and the machine failed. No display and no button function. One interesting fact is that if you hold the pause cancel button for a few seconds the contol lock light comes on. This makes no sense. It also did this with the previous ccu. The button that is supposed to activate this feature has no effect. Any suggestions? LMP

[denman]

Here are your parts
Replacement parts for WHIRLPOOL GHW9100LW1 | AppliancePartsPros.com

Here is a manual which may come in handy
https://secured.whirlpool.com/Servic...0Job%20Aid.pdf

Sounds like the user interface (keypad) may be the problem.
The wiring diagram seems to indicate that this is an active device (has integrated circuits on it). I am basing this on the connector designations 0A8.1 to 0A8.8, often this is an 8 bit word interface code (electronically).
There is no way to easily check individual keys as this requires special equipment and you need info about the electronics which is not available from appliance manufacturers.

You could try the following:
Unplug the unit
Open it up
Remove the ribbon cable from the keypad to the control board at the control board.
Clean the edge connector.
If it is the type where there is not a connector just the insulation is removed, it can be cleaned with a pencil eraser. Do not use an ink eraser as it is too abrasive.
Check the tracks in the ribbon cable for hairline cracks. A magnifying glass helps here.
Would not hurt to clean the connector on the board. Use electronics contact cleaner or isopropyl alcohol and a tooth brush. Be gentle and do not reconnect till all the solvent evaporates.
Reconnect everything and give it a try.

I doubt this will help.
You could check each wire from the end connector to the keypad to ensure they all have continuity.
I also would carefully check the back of the keypad with a magnifying glass to see if a circuit trail is cracked.
Also check the solder joints to the components for cold solder joints. They are often a duller gray color or have pin holes. Sometimes you can gently wiggle the component on the front of the board and see the component's leg move in the solder joint.

[LMP]

Thank you! I'll try it all and let you know.
LMP

[LMP]

I replaced the User Interface with the original CCU and the washer works fine. Thank you for the help. In the service manual it says that if the CCU doesn't beep when you put it in that the CCU is bad. When I put the replacement CCU in it beeped, ran for a few seconds and then the washer failed. There is no mention in the manual that this could be caused by the user interface. Again, thank you & Applianceparts pros for the help. LMP