Dishwasher will nto start. The display will alternate between displaying Lock on and No Heat dry.
Could be you have accidentally turned the lock on
Use the Lock to prevent your dishwasher from accidentally being turned on. Use the Lock, also, to prevent accidental cycle or option changes during a cycle.
When LOCK ON is lit, all buttons are disabled.
To turn on the Lock
Press and hold NO HEAT DRY for 4 seconds. LOCK ON glows.
If you press any pad while your dishwasher is locked, the light flashes 3 times.
To turn off the Lock
Press and hold NO HEAT DRY for 4 seconds. The light turns off.
I gave it a try but it did not help.
I think it is locked. When I hit any key it flashes 3 times. When I hold down the key for 4 seconds the locked light goes out. It still seems locked however.
Try disconnecting power from it for an hour or so.
Also a Model Number may help find some info about this unit.
I turned off the power to the dishwasher for 1.5 hours. It did not help.
The number on it is 17779990.
Here is a tech sheet that I think is for your unit
https://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%208051291.pdf
Hopefully it will help
Looks like you could have a stuck key on your keypad.
Unfortunately it does not give us the keypad wiring diagram which would let it be checked with a meter.
Is it easy to change out the display/keypad?
It is not difficult, just take your time.
Our 665 died yesterday, worked fine on weds. about 2 yrs old, mod 665.13843k600. no lights at all on the control panel. both door switches work (checked w/ DVOM) 110v to and thru thermal switch. How do I determine if the PC control board or the control panel is the culprit?