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-   -   Dishwasher Power Problem ( 02-15-2011 09:10 AM

Dishwasher Power Problem
Hi Sir/Madam

My name is Randy and I am trying to find out what could be possibly wrong with my dishwasher. It experienced a burning problem. I replaced the main PCB and the Power PCB, but still, no power. What could be causing this problem at this point? Could you please help me? 02-15-2011 09:22 AM

Dishwasher Problems
[;353361]Hi Sir/Madam


Gene 02-15-2011 01:08 PM

Hi Randy,

Check for 120 VAC at the power outlet for the dishwasher. If the dishwasher is hardwired then you have to call an electrician to find the right circuit breaker for the dishwasher and check the voltage.

Here are the breakdown diagrams and Replacement parts for LG LDF7811ST Dishwasher |

P.S. Duplicating posts and creating multiple threads with the same questions does not do any good for you and other people on the forum. 02-15-2011 01:49 PM

Dishwasher Problems
[;353370][;353361]Hi Sir/Madam

Hi Friend,

I have a question. Are there circuit breakers on all dishwashers? If so, where would they most likely be found? Thank you.


Gene 02-15-2011 02:21 PM


By the installation instructions any dishwasher must be connected to a separate circuit with its own 15amp or 20amp house circuit breaker. Usually all breakers are in a breaker box.

Gene. 02-17-2011 04:12 PM

Hi Friend,
This is Randy again from yesterday. I have power coming from the wall outlet to the unit. but voltage on the main board is less than 2 volts. My question is, Does dishwashers have thermal fuses? I not sure about this because if so, that would be the next thing i check. Thank you.

Randy 02-17-2011 04:19 PM

Hi Gene,

Are you there today? 02-17-2011 04:30 PM

Hi Gene,
I think that i will have to take a picture of the schematic of the unit and try to see what else could be causing this power drainage. However, I want to say thank you very much for the help that you have provided me and I want to wish you the best. Thank you.


Gene 02-17-2011 08:03 PM

You are welcome Randy.

There are no fuses in the dishwasher. Problem can be a bad noise filter (#A160 on the diagram), a bad door switch (part of the door latch) or a bad on-off power switch which is a part of the display board.

- The noise filter Part number: AP4457242

Part number: AP4457242

- The door latch assembly Part number: AP4438191

Part number: AP4438191

- The display board Part number: AP4441611

Part number: AP4441611

Here is the Service manual.


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