I have a Samsung DMT400RHS and I started getting the low water level error ('Normal'+Heavy'+Smart Auto' LED blinking). The error started intermittently a few weeks ago, but the the last day or two the problem was solid, and simply restarting the cycle no longer worked.
I looked of the code in the dishwasher user guide and it said 'low water level.' Searched the internet and located the repair manual at tradebit.com for $15. The manual was well worth the $15.
The manual suggested: 1) loose level sensor connector 2) Faulty Assy case sensor or stuck floater aka 'remove foreign matter' 3) Bad Main PBA assy.
Since we do 10+ loads a week for the last 18 months the stuck floater seemed to be the most likely cause.
Go to Samsung DMT400RHS Low Water Level Error ('Normal'+Heavy'+Smart Auto' LED) (new link is https://photos.google.com/album/AF1QipNtp1neOR7icVG8cSs71bLpxQD5k_xljiWcJD2P click the i on each picture to see the caption - DM 04/17/2016) to see the pictures and read the captions documenting what I did. Do this at your own risk. You must turn off and disconnect the electric power and turn off the water supply before you begin.
For some reason the link did was removed. The link ishttps://picasaweb.google.com/11705435319...
i must thank you. our dishwasher has been down since March, and since it was out of warranty, i was hesitant to call for repair. i figured I've nothing to lose by tearing it apart. it wasn't as dirty as i expected, but it seemed to work! its running thru a cleaning cycle now without shutting off.
i spoke too soon. it almost made it thru the cycle. looks like i gotta make a call now.
Scott my dishwasher would start, cycle water out, fill, cycle water out, then flash the 3 LEDs (Normal+Heavy+Smart Auto). All of that took say 3-4 minutes. It failed every time (it was intermittent for several weeks).
My level sensor looked like it was a biology experiment. Thanks for the pics.
Thanks for the tips. I've just cleaned it out, although it was not terribly dirty. I have turned it on and the lights come on, but so far no water flow into the machine. I'm not sure if it's having to recalibrate or what. I'll give it some time to "reboot," but I think I may be buying a new case sensor unit.
Donald- thank you. Although the parts weren't dirty i cleaned them out with gallons of hot water. It works now. maybe it was a loose connection as well.
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