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The lights that are blinking are indicating an error code--the particular code you describe is a "heater error". You will have to check the circuit for an open heater element, loose or broken wire, defective main control board. The part number for the main board is DE92-02256C. Hope I helped you!
I believe that error code indicates that you've got a leakage error, which means water has leaked down into the base of the dishwasher. You'll have to pull the dishwasher out, pull off the side panels, and dry up all the water, but then you still have the problem of figuring out where the leak came from and fixing the problem before you can use the dishwasher. The most common source of leakage in a Samsung DW is the drain pump and/or drain hose.
Page 26 shows blinking Heavy light means there is leakage in the dishwasher. Most likely there is water in the base under the drain sump which could cause the flood switch to trip. Turn mains power to dishwasher off. Pull it out from under kitchen bench without breaking the hoses. Put some towels on the floor and turn dishwasher back and forth on incline to get water out. Wait a little and turn on. If no difference then you need to dry the base and find the source of the leak. More likely the door seal.
Try to unstick the float. The float tells the DW how much water is in it at any given time. It is shaped like a mushroom on the bottom of the DW basin. Gently pick it up and set it back down. Does it seem free? Try the cycle again.
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.
see this causes and fix it. God bless you 1. No power to the dishwasher
Make sure there's power
getting to the dishwasher. Check for a tripped circuit breaker
or a blown fuse. Check
the wall socket for power. Sometimes the power cord disconnects
at the dishwasher
(inside the junction box, behind the bottom kick panel), if this
is the case, the wiring
must be repaired or replaced.
2. Door switch
Replace if defective.
3. Timer
Replace if defective (note: uncommon problem).
4. Selector switch
Replace if defective (note: uncommon problem 5( test the main board can be faulty and replace.
If three lights are blinking (normal, heavy, quick)... I just had this same problem, and I think I figured it out. There was
water on the bottom from the last cycle, so I pressed HEAVY and DELICATE
at the same time for 3 seconds (you'll see it printed on the control
panel), and the unit drained. I was then able to start the new cycle
normally without the error. Hope that helps!
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