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Does a LG model LDF 6920st have anything way to heat to hot water

Customer lives in large house and their hot water heater is quite a distance from dishwasher. She and my little lady thinks it has something in it to assist in heating the water coming in. I being a retired IBM customer engineer and repairing everything from tvs to my cars and motercycles say I don't think so. Only the heating element for drying the dishes after they are washed. Am I right?

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Dishwashers do have a water heater element. In fact, it's the same heater that is used for hot dry, but you can switch it off for the drying cycle if you want. Dishwashers heat the water so it will be hot enough to properly clean the dishes. Sorry, you lose the bet.

Posted on Nov 26, 2008

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I just purchased an LDF6920. It does not dry the dishes. In fact, there is water remaining in the bottom, and all the dishes and drum and door are beaded with water. It suggests putting some sort of...


First off, there should not be any (visible) water standing in the bottom of the dishwasher after the cycle is done. If yes, check the drain, installation of drain line, etc.
Second: The LG is a very energy efficient dishwasher, but in order to acheive this, it does not use a heater to dry the dishes. It relies on the residual heat from the hot water used in the wash cycle, plus a small fan to vent some moist air. It is imparative that you have soft water and use a product such as Jet Dry to assist with drying on the LG dishwashers. Even at that, plastic items (which retain little heat from the water) will not dry well, if at all. Plates, pots, glass, anything with some mass will dry. You may have to adjust the Jet Dry dispenser setting up a bit. If it is set too high, you will get white streaks on your dishes, so then back it off just a bit.

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1 Answer

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The heating element is turned on first during the main wash cycle, which could be approximately 10 minutes in. Since this error is coming up, the first thing to check/replace is the heating element.

I am only familiar with the LDF family of LG dishwashers and on them, to get to the heating element, you pull the dishwasher, invert the entire DW and remove the access panel.

Good Luck, please post back here what you find, OK?

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1 Answer

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The LG 7811 dishwasher is supposed to even support a cold water (vs. hot water) connection. Then it will heat the water up to 120 degrees upon each fill cycle. This is not optimal and it adds much time to the already long full cycle. When you run the hot water at the kitchen sink until it is hot and then kick off the cycle, is the water hot at the beginning? It should be 120 degrees minimum and well under 140 degrees maximum.
Do you get any error codes on the display? Troubleshooting is possible, but recommend you contact LG service at the number in the user guide asap. Press for fast, free resolution to this problem. Please reply when you have gotten this fixed, explaining what fixed this nice, quiet dishwasher. Good Luck!
PS: When you get it running, do not use ultra-cheap dishwasher soap. Recommend Electrosol powder or cascade. Never use gel or tablets on this water conserving dishwasher.

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British machines are Cold water fed, and the machines heat the water themselves. American Machines are hot water fed.

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