[albert brodeur]

Gentlemen,
this dryer ,s control panel will light up and go off by itself. and it will not always do this sometimes it will stay off like it should and then other times it off and on only the control panel lights up the dryer drums does not turn or heat but it will if the stsart button is pushed everything looks ok no corrison that is visable the power switch on the user interface board checked ok
I do not have a schematic of the interface board or the machine control board
P/N's of the boards machine control board is 3978982
Interface board is 8564376
which of these devils is the bad guy?
thank you
al brodeur

[denman]

These should help narrow it down
https://www.servicematters.com/docs/...0W10035270.pdf
https://www.servicematters.com/docs/...%203978975.pdf

Sounds like a bad connection somewhere, probably going to be a royal pain to find.

RIBBON CABLE CLEANING
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.

[albert brodeur]

I have done all of that using contact cleaner and the pencil eraser but later I swapped the power switch with another cycle one and it has worked so far
what bogels the mind is that power comes into a normaly closed switch yet by pressing it the unit turns on

[denman]

Do not know what power switch you are referring to so cannot comment.

I guess don't argue with success applies!!!