What Causes Samsung Dishwasher NORMAL HEAVY SMART AUTO Lights Flashing

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When you see your Samsung dishwasher lights NORMAL – HEAVY – SMART AUTO flashing, you need to refer to the tech sheet on the device to decipher the error code. Samsung dishwasher is a smart appliance that means that in case any component is not working correctly, you can expect to get notifications.

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Resolving error codes on the Samsung dishwasher is not hard; slight corrections such as adjusting water supply temperature or correct installation of drain hose should do the trick depending on the error.

· Caution! Before digging into what could be the problem, your attention is getting drawn towards, always be sure to cut off the power supply to the Samsung dishwasher. Testing the power outlet for proper voltage is also wise. And finally, turn off the water supply.

What Does the “Normal” “Smart Auto” and “Heavy” LED Flashing Mean?

So, you start a cycle, hear the water get in, but after a minute, the drain pump kicks on draining everything away before the wash cycle, then you get those NORMAL – HEAVY – SMART AUTO lights flashing? Well, what your Samsung dishwasher is trying to tell you is that there’s a problem with the case break sensor.

So when you got this error code, that means a low-water level error. A Samsung dishwasher has a case break overflow water sensor that monitors the water level and sends activation signals to the drainage pump in case of an overflow, low water level supply, or just a general water supply error.

If your Samsung dishwasher is in good condition, the drain pump shouldn’t kick in right after was filled with water. But if your dishwasher keeps draining out, then it could be due to

· A blocked supply valves

· A broken case sensor or it just dirty inside

· A problematic Flow

Samsung Dishwasher Error Code List

  • If HEAVY QUICK+ SMART AUTO flashing – Temperature Sensor issue
  • If HEAVY QUICK+ flashing – Heater Error
  • If NORMAL SMART AUTO flashing – High-Temperature Heating Error
  • If NORMAL HEAVY SMART AUTO flashing – Low Water Level Error
  • If SMART AUTO flashing – Water Supply Error. Check whether the water supply valve is closed or water supply is suspended or water inlet valve line is frozen or clogged by foreign particles.
  • If NORMAL QUICK+ SMART AUTO flashing – High-Temperature Water Supply Error. Check the temperature of the water to make sure it’s not high then 167 Fahrenheit or 80 Celcius.
  • If QUICK+ flashing – Drain Error. Check the drain hose and the drain pump.
  • If HEAVY SMART AUTO flashing – Over Level Water Error. Check Overflow Water Sensor (on the left side of the dishwasher) and blow into black rubber hose which is connected to the sump. If its clogged, that sensor (it’s actually 2 probs with blue wires connected to) will not “see” how much water got in the dishwasher. See pictures below
  • If HEAVY flashing – Leakage error. Water in the bottom pan of the dishwasher.
  • If NORMAL QUICK+ flashing – Button error.
Samsung Dishwasher HEAVY SMART AUTO flashing, How To Fix It?

How do you fix the low water level error?

1. Clean the Overflow Sensor

You will need a Philipps Screwdriver and a Longnose Pliers. Follow the manufacturer’s standard procedure to get to the overflow sensor.

The overflow sensor has two parts: The case sensor and the flow meter assembly. The flow meter assembly has a little spinning wheel, while the case sensor chamber has a floating piece that moves up and down depending on the water level in the unit.

The case sensor is just a rudimentary system with two exposed electrode prongs such that when water reaches them, the circuit becomes complete, and the draining mechanism is triggered.

But water is not the only thing that could complete the circuit. Residues from corrosion, molds, and hard water can also complete the circuit triggering the error code.

Therefore, in the case that the error code results from a corroded sensor, cleaning the sensor chamber should fix your dishwasher. To access the sensor chamber, use a half-inch drill to make holes near the sensor, taking caution not to damage the sensor electrodes or float piece. Next, use stuff such as alcohol, CLR, q-tips to get rid of hard water sum and mold.

Finally, seal back the chamber using a thick plastic and sealants that can handle high water temperature.

3. Replace Broken Case Sensor

In the case that cleaning the sensor chamber didn’t fix the Oe error code, then probably the case brake sensor is broken, and you have to pony up for a new Over Level Water Sensor. Follow the manufacturer’s guideline to install the new case brake sensor into your system. And if you still get the same problem, replace the flow meter assembly.

Depends on your dishwasher model, you will need the whole Case break assembly (click here) or just overflow sensor (click here).

A faulty case brake system does not only send overflow water level errors, but you could also get low water level error or water supply error. The hacks mentioned above should be able to fix the failure.

Smart Auto and Heavy LED signaling lights are common on Samsung dishwashers. Customers across the world are reporting frustrations due to the faulty case brake systems. You turn on the cycle, hear the water coming in, then suddenly the drainage pump kicks in, and all the water is gone! Very unfortunate.

If your water is hard, you can expect this failure at some pint down the line unless you use a water softener. And if the sensor chamber is already corroded, open it and give it a blitz as directed above. The good thing with drilling holes to clean the chamber and sealing them back with plastic is the plastic can be removed easily for future cleaning tasks.

And finally, in the case that all the above hacks don’t work, check if the unit is satisfied with the amount of water that is coming in. Leaking valves and drains can trigger the Smart Auto and Heavy lights too. Inspect the recesses of your dishwasher for leaking components. Tighten the water supply line dry the inside of the dishwasher using a paper towel.

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13 thoughts on “What Causes Samsung Dishwasher NORMAL HEAVY SMART AUTO Lights Flashing”

  1. I have a samsung diaswasher dmt300rmf and the heavy and quick light are blinking, what does that mean and what can i do to fix it?

    Reply
  2. I need help. All of a sudden my Samsung dishwasher stopped working after a contractor replaced my kitchen faucet. I swear it’s something he did wrong, because all of a sudden it doesn’t work. It fills up but I don’t think all the way. It drains and drains but never washes. Keeps draining and then flashes “normal, heavy and smart auto”. The dishwasher tab drawer never opens and I see food residue on the bottom of dishwasher even though no dishes are in there. Samsung model DW7933LRASR. Sears technical told me it would cost around $350 to fix. But I know or hope it’s a simple fix; something I can do. Help a female in NJ.

    Reply
    • If NORMAL+HEAVY+SMART AUTO is flashing that means (most likely) water fill assembly (case sensor assembly) partially clogged and the dishwasher control board can not see how much water coming in the dishwasher. This assembly located on the left side of the dishwasher. I hope this video will help https://www.youtube.com/watch?v=WW8lGqK6xyE

      Reply
  3. I have a samsung dishwasher, model DW80N303OUS and the normal light keeps blinking. Machine sounds like it is draining but no water is in the machine. The dishes are not dry. I turned the breaker off but this did not change anything. Any and all help is appreciated.

    Reply
    • Flashing NORMAL CYCLE light means there is leak. You need to pull dishwasher out and remove left metal cover on the side. Maybe you will be able to figure where leak coming from. Then you need to lay dishwasher on its back or on the right side, be prepare to catch some water. Remove bottom cover, underneath dishwasher.. You will see leak sensor. Wipe that area, to remove residual water and assemble it back.

      Reply
  4. I had to turn off the water supply to the house for an unrelated plumbing issue. When I turned the water back on, I got the Normal light blinking. When I hit start, the machine drains for about 2 minutes and then stops making noise and the Normal light continues to blink. I’ve turned off the breaker for 15 minutes, but no luck. Suggestions?

    Reply
    • did you ever figure it out? We had a broken water main nearby and had no water. As soon as that happened, our normal light started blinking. Haven’t been able to figure it out

      Reply
    • Why do you need to reset dishwasher? Usually, you need to turn power OFF on the breaker panel to reset the control board, but as I know there is no procedure to reset it through the buttons

      Reply
  5. Great guide! Mine was just junked up with scale. I filled mine with 50/50 CLR and water, and set it aside for 2 hours. Then carefully shake it for a few minutes with your fingers in the two main holes. Rinse off with water and repeat. Do it a couple times and your good.

    Reply

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