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Hey guys, I am a dishwasher repair guy in barbados, the caribbean. I am having problems with a Hobart LX30H. the relay board is doing half the things right and the othrs not at all. I replaced it with a new one and the same results. At startup, the wash sump heater and wash motor are running, but the fill valve, drain valve and rinse booster are not running. Hence the startup operation is stalled. the funny thing is that the rinse booster and fill valve led's on the relay board light up at there correct operational times show these processes but the processes are not actually carried out.

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Not sure what sort of problems (fault codes etc) you were having before you chose to go on the path of replacing the relay board.

It might help to know what fault codes you have been noticing.

One possibility is that the power supply is not giving enough current to operate the devices which you notice are not starting eg, sump heater, fill valve, drain valve. The LEDs coming on does not mean the devices have got the actual power. The relay might have actuated and that is what the LEDs convey.
You have to check incoming water temperature plus the water pressure as well.

I am assuming you have a proper user guide for this, if not see

Please post a comment to say if this is helping or not. Happy to try to help you fix this. I do not have access to a repair manual for this manual.

Posted on May 14, 2010

  • webmaster400 May 14, 2010

    I was looking to save some time by asking you guys yesterday, but I had no choice but to dive right in and do full diagnostics because they needed the washer for the weekend. It turned out that the incoming power for one set of relays was cut by a blown fuse but not for the other set of relays on the same board. Thanks anyway. Just got back from the client and the washer is up and running. By the way, the error codes don't help for some problems. Thanks any.

  • Sam May 14, 2010

    Thanks for your posting. Glad to know the problem was with the power supply as I had thought.

    Please do rate the solution provided by as it helps to know what our customer think of the efforts taken by the consultants.



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