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My 3 year old LG ldf7920st dishwasher has no power. the breaker and power lines to the dishwasher are working, but the on button does not turn the dishwasher on. Any ideas what is wrong?

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4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Coleman37
  • 337 Answers

SOURCE: LG LDF7920ST dishwasher, screw fell into wash pump

Have you tried using one of those tools that have a magnet on the end to see if you can get the screw out? Good luck!

Posted on Mar 04, 2010

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  • 1 Answer

SOURCE: Our LG LDF7920st dishwasher (6 months old)makes a whistling noise

Hey, consider the float assembly!

We bought this dishwasher and ran it for the last 1 1/2 months and it made a grinding and whistling sound from day one (it's supposed to be nearly silent in its operation). Turns out the drain pump was cutting in while the machine was still filling, thereby emptying the wash tub of any water. Then, when the cycle proceeded to wash, the dumb thing had no water and made a horrible noise. So I had to pitch in at least 2-3 litres of hot water, and then it worked quietly! Had to do this every time there was new water intake.

After working with the repairmen - four visits later, we isolated the float assembly as the problem and they set about replacing the part. Turns out the two parts were markedly different. LG HAD INSTALLED an older model float assembly at the factory and it was the problem. The replacement part was the correct float assembly and things worked perfectly after that - thank goodness. No more babysitting the dishwasher.

Don't let anyone tell you the motor assembly needs replacement. I have seen that cop-out 'fix' all over the web. But use deductive reasoning to find out where the problem is in the cycle, and explore this option first - it's a quicker and cheaper fix than replacing the whole motor assembly.

'Mr. Float' as he is now called works like this:
-expels any residual water in the tub from the last wash
-intakes water for the wash or rinse
-whirs 2-3 times prepping for the cycle
-begins to wash, quietly
-expels at the end of the wash or rinse.

He used to:
-expel residual water
-intake new water for wash or rinse
---drain pump would cut in WHILE still filling
-machine would whir once, realize it didn't have enough water
-perform a brief top-up intake shot
-begin to wash and whistle and GRIND (this is where I would have to add the water)
-expels water from wash or rinse, and start all over again.

It's a good dishwasher and it will work, but the right model parts have to be in place!

Posted on Jun 02, 2011

  • 1 Answer

SOURCE: Hi I have a 2 year old lg LDF7920ST Dishwasher...

There is a drain in the evaporator (inside the door) that has a black tube that is clogged in the tube or where it connects. Food or soap scum can clog it and the water will flow down the white tube to the floor. Remove the screws form the door and then clean out the tube and nipple part.11_16_2012_6_15_43_pm.jpg

Posted on Nov 16, 2012

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LG dishwasher LDF6920ST - Power button lights up but the cycle buttons stopped working so the unit wont turn on to wash. The Power Scrub cycle button seems to be pressed down farther than the other...


Hi Mark.

Modern LG appliances retain settings even after you disconnect the power cord. The machine is reset opening the door and then pressing and holding the Normal and Delicate buttons at the same time for 3 seconds.

You can also try running the test mode shown at page 12 of the service manual.

If the machine is non responding and there is no code on display, then the problem is likely control module or control pad. Since the control pad looks defective, that is probably the part to replace.

Disassembling is shown in exploded view and service manual available using the links below:


Parts and diagrams are available here.

A copy of the service manual covering several LD models has been uploaded here.

Regards.

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Hi,

The scum, film and white residueproblems have started since the reductionof phosphates in dishwasher detergents.

Here is a tip that will help you to solve the problem of films, residue, and scum in your dishwasher.

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This sounds like your motor is not circulating properly, this will cause the spray arms not to operate properly, or at all. Are you receiving any kind of error code on the display? Also, how far is the dishwasher filling up?

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Wash cycle stopped with water in the bottom. Seems like there is no power. Can't get lights on cycles buttons to turn on. Power button does nothing. Checked circuit breakers. All are on. Lights and outlets...


Check the wiring in the units junction box. Its located at the bottom right corner. You will likely find melted connectors. If so, you need to cut the wires back and replace these connectors. Make sure you turn the power off before doing any of this work of course. Good Luck.

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Hi I have a 2 year old lg LDF7920ST Dishwasher... It started leaking out of the bottom about 3 mths ago. Now it makes a load grinding sound when attempting to wash dishes...


There is a drain in the evaporator (inside the door) that has a black tube that is clogged in the tube or where it connects. Food or soap scum can clog it and the water will flow down the white tube to the floor. Remove the screws form the door and then clean out the tube and nipple part.11_16_2012_6_15_43_pm.jpg

Jul 05, 2010 | Dishwashers

1 Answer

LG LDF7920ST dishwasher, screw fell into wash pump


Have you tried using one of those tools that have a magnet on the end to see if you can get the screw out? Good luck!

Mar 04, 2010 | Dishwashers

1 Answer

Dishwasher LDF7920ST. Connection to water inlet leaks


if it just started the water inlet is probably defective. this can be obtained at your local hdwre. store. be carefull these oarta are brass and are really soft. pull the dish washer out and tip it up or remove it, dont try to change it where it is.

Jan 02, 2010 | Dishwashers

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Dishwasher doesn't turn on at all


fan fail safety switch
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Jul 19, 2009 | Kenmore 60172 Electric Commercial Dryer

1 Answer

Our LG LDF7920st dishwasher (6 months old)makes a whistling noise


Hey, consider the float assembly!

We bought this dishwasher and ran it for the last 1 1/2 months and it made a grinding and whistling sound from day one (it's supposed to be nearly silent in its operation). Turns out the drain pump was cutting in while the machine was still filling, thereby emptying the wash tub of any water. Then, when the cycle proceeded to wash, the dumb thing had no water and made a horrible noise. So I had to pitch in at least 2-3 litres of hot water, and then it worked quietly! Had to do this every time there was new water intake.

After working with the repairmen - four visits later, we isolated the float assembly as the problem and they set about replacing the part. Turns out the two parts were markedly different. LG HAD INSTALLED an older model float assembly at the factory and it was the problem. The replacement part was the correct float assembly and things worked perfectly after that - thank goodness. No more babysitting the dishwasher.

Don't let anyone tell you the motor assembly needs replacement. I have seen that cop-out 'fix' all over the web. But use deductive reasoning to find out where the problem is in the cycle, and explore this option first - it's a quicker and cheaper fix than replacing the whole motor assembly.

'Mr. Float' as he is now called works like this:
-expels any residual water in the tub from the last wash
-intakes water for the wash or rinse
-whirs 2-3 times prepping for the cycle
-begins to wash, quietly
-expels at the end of the wash or rinse.

He used to:
-expel residual water
-intake new water for wash or rinse
---drain pump would cut in WHILE still filling
-machine would whir once, realize it didn't have enough water
-perform a brief top-up intake shot
-begin to wash and whistle and GRIND (this is where I would have to add the water)
-expels water from wash or rinse, and start all over again.

It's a good dishwasher and it will work, but the right model parts have to be in place!

Jun 27, 2009 | LG Dishwashers

1 Answer

Whirlpoool dishwasher not turning on model du1050


Make sure you have power to the dishwasher, check circuit breaker. If circuit breaker is ok, then remove toe panel at bottom front of machine, on the right hand side is where the power cable goes into a little metal box. Turn off circuit breaker to kill power to the dishwasher, remove electrical box cover and check to make sure that the wire nuts are tight. Reapply power and test. If still no go then remove tech service sheet from toe panel insulation, get yourself a multi-meter and start test individual components until you find the one that is bad. Hope this helps.

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