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Samurai Appliance Repair Man's Blog



How to troubleshoot a Samsung dishwasher with an HE error code

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 08 September 2011 · 5,022 views

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 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.


Part link for the heating element ==> Heating Element


Source: Samsung dishwasher DMR78AHS -- HE is displayed


How to test the touchpanel keyswitch contacts in a Maytag MDB dishwasher

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 04 September 2011 · 1,326 views

Master Reg lays out the drill:

Checking keyswitch contacts:

Unplug dishwasher or disconnect power.
Remove connector P1 from the control board.
Using the table below,
http://appliantology...-ii-dishwasher/
measure the resistance across the switch when the key is pressed.
NOTE: The meter must be connected with the proper polarity.
This test will not work on models with a “touch sensor” type user interface.
The resistance reading should go from infinity (open circuit) with the key open
down to a readable Ω level with the key pressed.
The level may be different depending on your meter, since there is a diode in the circuit.
If available, you could use the “Diode Test” function of a digital meter,
which will give a voltage to turn on the diode in the circuit.
➔If any switches fail this test, replace the console panel/keypad assembly.
➔If all switches test OK, replace the machine control board.

KeyPad assembly
click on picture
Posted Image


Part links:

W10240046 Black
W10240047 White
W10240048 Biscuit


Source: Maytag mdb6709aws0 dishwasher inop.


Troubleshooting information on transorbs used in GE Triton dishwashers

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 01 September 2011 · 2,103 views

First, begin with my seminal tome on the topic ==> http://fixitnow.com/...ircuit-breaker/

And then on to this enrichment material from Master Reg:

here's some info.

also: Service Bulletin GE TRITON XL DISHWASHERS

GSD6000 SERIES
PDW7000 SERIES
EDW4000 SERIES

Transorb kit

*Shorted Transorb will likely damage the main electronic control board.
click on picture
Posted Image

seems to be a 1.5KE220CA Bi-directional TVS Diode
(about $1)
1500w peak 220v C = bi-directional

Posted Image


Source: GE Dishwasher Mod# GSD3900L00BB


Scientists discover toxic dishwasher fungus

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 19 August 2011 · 973 views

Scientists discover toxic dishwasher fungus
June 22, 20


Posted Image

Once rarely found in nature, the potentially deadly black yeast fungi have begun to expand their territory.

And the new frontier could be your kitchen.

A team of European scientists sampled nearly 190 dishwashers in family homes around the world. They found black yeasts living on 62 percent of the rubber seals surrounding the dishwasher door.

The study appears in the journal Fungal Biology.

According to the researchers, black yeasts are “extremophile” fungi, which means they thrive in extreme temperatures and conditions.

The high heat, harsh detergents and humidity provided by dishwashers, coffee machines and washing machines provide just the right touch of comfort for these deadly fungi.

"The discovery of this widespread presence of extremophilic fungi in some of our common household appliances suggests that these organisms have embarked on an extraordinary evolutionary process that could pose a significant risk to human health in the future," said the authors.

The yeasts, also known as Exophiala dermatitidis and E. phaeomuriformis, have been associated with illness and death in people.

According to the researchers, the fungi are especially partial to the lungs, so people with cystic fibrosis are most at risk.

One of the authors, Nina Gunde-Cimerman, a microbiologist at the University of Ljubljana in Slovenia, told The Daily Telegraph one thing not mentioned in the report was that "we tested the dishes after they had been cleaned in these dishwashers and they were full of this black yeast, so too the cutlery that you put in your mouth. We just don't know how serious this could be."

The researchers say other fungi species also were found in the rubber seal.

And they warned that "further research is imperative," given the ubiquity of dishwashers and their concern about increased fungus-human interactions.




SOURCE: http://californiawat...er-fungus-11004





How the check ball in a Frigidaire dishwasher works to alternate spray between the upper and lower spray arms

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 19 August 2011 · 1,357 views

Check ball works in conjunction with short pauses in timer cycle to oscillate spray between lower arms and upper, during the cycle, puses approx every 5 min and switches over





Source: Frigidaire dishwasher PLD4375RFC3






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