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Samsung dishwasher DMR78AHS -- HE is displayed


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5 replies to this topic

#1 Pegboard

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Posted 07 September 2011 - 03:53 PM

My Samsung dishwasher is about a year and 5 months old. The HE code appears in the dishwasher's window. I followed the suggestion in the owner's manual to insert detergent and run dishwasher without dishes. The result was the HE code appeared in the window and the entire cycle did not finish.
I called the 800 Samsung number and was told to turn off the dishwasher circuit breaker, turn it on, then run the dishwasher empty with detergent. The result was the same. That is - the HE code appeared in the window and the entire cycle did not finish.

How do I fix my dishwasher?

I would appreciate your advice.
Thanks so much.

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#2 SANTA

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Posted 07 September 2011 - 04:26 PM

HE is a heater error. Take the bottom kickplate off and check the heater connections. Hopefully you can find the tech sheet that is with the machine to run diagnostics test

#3 john63

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Posted 07 September 2011 - 08:51 PM

Usually a failed HEATING ELEMENT or HEATER RELAY.

Disconnect power & remove the dishwasher from under the counter.

The HEATER RELAY is located on the right side of the D/W. A metal panel/shield (on the right side) must be removed to gain access for testing.

Testing the HEATING ELEMENT *can* be done from the bottom/front---but is easier if the D/W is placed on it's back---and removing the bottom cover/panel.

In many cases I have seen failed HEATING ELEMENTS or RELAYS on Samsung D/Ws---in homes which had an INSTANT WATER HEATER (AKA: Tankless Water Heater).
This type of Water Heater requires a minimum GALLON-PER-MINUTE of water flow---before it will *heat* the water.
Many dishwashers have a lower GPM flow rate than required---this results in NO HOT WATER at all during water fill.
The D/W heating sytem remains "on" for long periods of time---each time the D/W is used.
Eventually the HEATING ELEMENT or HEATER RELAY fails.

Edited by john63, 07 September 2011 - 08:53 PM.

To eliminate:

Musty odor

L-O-N-G cycle times

Dingy/yellowing whites

Suds error message

Slow spin speeds

Intermittent water leaks (from rear of washer)

And other annoying symptoms which vary brand-to brand.

Read below:

The *correct* amount of HE (High Efficiency) detergent that should be used in any front load or agitatorless top load washer with tub sizes 3.0 cu ft and larger is as follows:

HE: (2) Tablespoons Per Wash Load

HE 2X: (1) Tablespoon

HE 3X: (1) Teaspoon

Perform a TUB CLEAN CYCLE every (4) months.

Use: "Tide Washing Machine Cleaner"

#4 Pegboard

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Posted 08 September 2011 - 05:46 PM

We have removed the kick plate and the connections look fine. Is there a way to determine whether the heating element or heating relay is faulty or if both are faulty?
Thanks so much for your input.

#5 Samurai Appliance Repair Man

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Posted 08 September 2011 - 06:16 PM

Easy enough to check the heating element with a fidollah multimeter. Buy one at your local hardware store and read this page for help measuring electrical resistance, which is what you'll be measuring on the heating element.

#6 Pegboard

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Posted 21 September 2011 - 09:55 AM

Where can I obtain a drawing or schematic of the inside of my Samsung dishwasher DMR78AHS, showing where all of the parts are located, especially the heating elements, relay, and board?
Thanks so much!






Recent blog entries on this topic

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How to troubleshoot a Samsung dishwasher with an HE error code

By Samurai Appliance Repair Man in Samurai Appliance Repair Man's Blog, on 08 September 2011 - 02:54 PM

Master john63 enlightens us:

Usually a failed HEATING ELEMENT or HEATER RELAY.


Disconnect power & remove the dishwasher from under the counter.

The HEATER RELAY is located on the right side of the D/W. A metal panel/shield (on the right side) must be removed to gain access for testing.

Testing the HEATING ELEMENT *can* be done from the...

Read Full Entry →

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