Dishwasher stopped working, burning smell

Dishwasher Repair
1

Our Kithchen AId KUDS01IJBS0 stopped working mid-cycle with a strong burning smell. No LED lights come on at all, but power does come to the machine. I suspected motor, but it is clean and turns freely. Next I looked for thermal fuse, and it had charred plastic all around, but still tested good. I replaced it and the ECU, which also showed signs of charring. Still no change. No lights, no nothing. I can trace power to the ECU. What’s next? The touch pad? How can I test for that before I spend $150? Or do we buy a new dishwasher?

Thanks – Erwin

2

I just installed a whole new switch panel, and nothing. No lights no reaction to pushing buttons. I can still trace 120V to the ECU in 2 places P2-6 and P8.

What if my new ECU is bad? How could I test it? Please help, I’m getting very frustrated.

Thanks – Erwin

3

Here is your tech sheet
http://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%208269519.pdf

Are you checking for power from P7 to P8 and P2-6?

4

[quote=denman;195359]Here is your tech sheet
http://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%208269519.pdf

Are you checking for power from P7 to P8 and P2-6?[/quote]

Exactly, 120V between both locations. Are there any other points I can check? Thanks for the sheet!

5

An electronic schematics of the board is not available so basically all you can check is if it is getting power.

Next I would check the keypad/control panel with the meter.
This is probably a long shot as it should give an error if you have a stuck key locking the unit up. Perhaps you have a stuck key but the LED for that key is shot.

6

[quote=denman;195627]An electronic schematics of the board is not available so basically all you can check is if it is getting power.

Next I would check the keypad/control panel with the meter.
This is probably a long shot as it should give an error if you have a stuck key locking the unit up. Perhaps you have a stuck key but the LED for that key is shot.[/quote]

I have tried a new keypad panel, but I still had no result. No button did anything and no lights came on.

What else could cause all the lights to stay out? Anything else that could have burned? I saw charring around the ECU, thermal fuse and LCD readout, but I’m not sure that couild have caused all the burning smell we encountered.

Thanks – Erwin

7

I’m stumped!!!

You have replaced both components that would cause the problem and you have power to the control board, it should light up.

You could try disconnecting the motor to see if it will run.

I think, something is either pulling down or blowing the DC supply on the control board.

8

[quote=denman;195897]I’m stumped!!!

You have replaced both components that would cause the problem and you have power to the control board, it should light up.

You could try disconnecting the motor to see if it will run.

I think, something is either pulling down or blowing the DC supply on the control board.[/quote]

Thanks for all your help. We decided to buy a new one. I couldn’t think of where to go from here, and the dishes were stacking up :slight_smile:

I had initially taken the motor out, clean out the debris, and it turned freely and started right up after hooking it up to 120V.

Thanks – Erwin

9

Sorry I could not be of more help.

Burn up problems are a pain unless you can isolate what caused the initial problem and many times this is difficult to say the least.
Also trying to repair/troubleshoot bad wiring and connectiopns can take a huge amount of time.

Many times as you have decided it is not worth all the effort and time.