Question about Samsung DMR77LHS Tall Tub Dishwasher

2 Answers

My Samsung DMR77LHS dishwasher has lost power completely near the end of a cycle. About an inch of water remains. I have power to the unit. I checked the 15 amp fuse in the unit - it had blown. I replaced it, but still no luck. The fuse is not blowing, but there is no power to panel. Nothing happens when you hit the power button - no lights or anything. Unit acts as if ther is no power at all. I have seen similar posts. Any thoughts?

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  • 12,061 Answers

Hi, whenever a fuse of that magnitude, or any fuse really, Blows, you should never just replace it, as to have any device, blow a fuse, trip a breaker, requires a major fault, they do NOT blow spontaneously ever. So you have had a major short circuit inside your machine, at some stage, usually this is in, the main Controller Board, most likely the bridge rectifier has gone short circuit, or a capacitor, But it could be anything even the motor?anything like this then will blow the fuse. The reason the fuse blow is to prevent a fire and explosion or both, as if an unlimited amount of current could be drawn, it would be catastrophic, so a fuse blows to disconnect the power. The Cause of this MUST be discovered before one ever attempts to replace the fuse. Luckily, it seems in this case the fault has blown an open circuit on the main Board, and this has prevented any further trouble.
Really after such an event as this one should engage the services of a professional, as anyone untrained may mis something that later on my even prove fatal. Get this unit looked at by a professional service person, ask for a 'Quote" if concerned about costings, then you can make an informed decision as to what to do.

Your support site is below,
http://www.samsung.com/us/support/detail/supportPrdDetail.do?menu=SP06&prd_ia_cd=&prd_mdl_cd=&prd_mdl_name=DMR77LHS

Posted on Sep 14, 2010

  • Crystalctx Mar 01, 2011

    My Samsung dishwasher has blown a fuse for the third time as of today , in a span of about 1 1/2 years. I will never purchase any of their products ever again. I also had to get them to refund my money on a refrigerator after multiple problems within the first year of ownership.

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  • Contributor
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I have exactly same problem as Crystalctx. As of today, it is 3 1/2 years and I have replace the fuse 6 times (3 box of two). Almost regularly - once in 6 months.

Posted on Dec 12, 2011

  • 2 more comments 
  • Vlad Sep 22, 2012

    Where is this fuse? I've looked everywhere and I can't find it.. I have the model DMR77LHS/XAC bought in Canada 3 years ago. I have followed the Service manual and opened the right hand side panel but it's not there. I also opened the front the left and nothing. I then opened the door still no fuse. Where is this fuse exactly?

  • Jack H. Scholl Jan 22, 2013

    I have a DMR77LHS bought in Texas. If yours is the same as mine it is on the bottom of the machine on the right side and is most easily reached by removing the metal cover on the lower right hand side. The fuse is inside of a small black inline case which separates when you unscrew the two pieces.

  • Dennis Lee
    Dennis Lee Jun 03, 2014

    Kind of late but if you still need. The fuse is located at the left side bottom. Inside black tube. You can twist it to open.

  • Dennis Lee
    Dennis Lee Jun 03, 2014

    If anybody has same problem is suffering to change it often, I have extends the line and take it out of the dishwater box so that I can easily replace it without taking dishwaher out. Since then, the fuse hasn't brown out for several years.

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hti had athe same problem, and the fuse fixed it. it turns on now,

you can get to the fuse casing, small tube about 1.5 inches , black, by flowing the electrical line to the, inside , or the under carriage, on the side of the bottom of the unit.
15 amp 250 volt at radio shack.

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2 Answers

No power


Hi,
The main PSU is part of the control board. You may be lucky to find an aged fuse to replace, but it's more likely a power transistor that's fried.

Unplug and remove the control board to see which bit's toasted. Chances are it's cheaper to replace the control board - but check the probable cause - the motors are not short circuited.

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