Question about LG 24 in. LDF 7811 Stainless Steel Built-in Dishwasher

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Lg dishwasher never heats water

Brand new $1500 dishwasher. all cycles wash with cold water. Needless to say, dishes & glasses leave stains.

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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.

Posted on Mar 31, 2009

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6ya6ya
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Posted on Jan 02, 2017

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Kenmore dishwasher leaving a lot of water on door, bottom, wall and dishes! it STINKS!


The pump could be leaking. The drain could be plugged - hence the smell. Taking a look underneath could reveal what needs to be fixed. I don't have an answer for why dishes are still wet even after a hot wash and heated dry but perhaps it is related to the other problem

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Just got a new Bosch dishwasher (forget which model). After the dishwashing cycle has ended (even long after), the dishwasher and dishes are still wet. Was this an installation problem? Thanks


Hi -
I can't see how any installation problem would cause this - if the dishes are still wet at the end of the cycle, you'll probably find the water isn't heating during the wash cycle. The dishwasher uses steam to heat the washing compartment and dry the dishes. It would appear that the dishwasher isn't heating water internally.
Even if the washer was accidentally connected to the cold water supply ** (see note), this shouldn't happen as regardless of the water supply temperature, the washer should still heat the water to the correct temperature internally.
** UK dishwashers should be connected to the cold water supply. For US installations, dishwashers are commonly connected to the hot water supply. For other locations, please consult your installation instructions.
I suggest you start a regular wash cycle and leave it to run for 10-15 minutes. Then open the door and test the temperature of the water in the base of the washer by hand. The water should be hot and there should be steam present in the washer when you open the door.
If the water is cold or only warm, the water isn't being heated internally or isn't heating to the correct temperature, in which case you should contact the retailer or Bosch Service immediately for a replacement. Do not accept an offer of repair on a brand new washer!
Additionally, do not attempt to repair the dishwasher yourself when under warrantly as this will invalidate the warranty.
Hope this helps. If you need further assistance, please let me know your location and the model number of the washer. This should be laser-etched into the top of the door if you can't find it on any of your paperwork.
Regards, BElectric

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My Lg dishwasher is new stainless steel tub is not shiny like orignally white spots and white film is on my colored drinking glasses and clear glass is spoted


First perform a vinegar cycle wash in the dishwasher. Pour a cup of vinegar into the bottom of the dishwasher. Keep the temperature at the highest setting possible and perform a wash cycle.Then start using a dishwasher most probably that would solve the problem. If this does not solve the problem then there must be some parts worn out or faulty creating the problem.

There are many probable causes of failure .

To clean the dishes the water temperature is essential.It the water is not hot then the dishes will not be cleaned properly.So check the water temperature.

Also check the filter in your dishwasher.Clean the filter if there is accumulation of debris in the filter

If you are in an hard water zone , then try reducing the amount of detergent used and then try cleaning the dishes.

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Dishes always come out cloudy ... white cloudy stain on inside of door, etc. We use electrosol power ball cubes. We set wash cycle to normal wash.


The problem is hard water. Go to www.dishwasherfilter.com. They have a new product out that solves this problem once and for all. It filters the water entering your dishwasher and removes the hard minerals that cause these spots. Very affordable and guaranteed to leave your dishes looking amazing every time.

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The most common cause of film left behind is a broken heating element.

The heating element is not only used during the dry cycle, but also to raise the water temp. during the main wash cycle to activate the dishwasher detergent. Fixing the heating element should "clear" this problem right up!

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1 Answer

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First, scrape your dishes clear of food before putting them in.  Rotten food makes smells.  Second, use a good brand of detergent in the recommended amount and use the heating cycle to heat the water up.  
Most dish washers have a dryer heat cycle but this one apparently does not.  This may cause mold in the machine.  
How to get rid of the smell:  With no dishes in the machine, add half a cup of bleach in the bottom of the unit and do a full wash cycle.  If the unit still has an odor, get some baking soda...about a half cup and put that in the bottom of the machine.  Close the door and leave overnight.  Then, run the machine through one wet cycle...say a wash cycle and then it should stop smelling.
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Dishwasher leaves soap in dispenser.


Hi Dirty Dish gang.
After having 2 appliance repairmen here, I now have the latest scoop on our dishwasher problems, $200 later!
Los Angeles IS currently having hard water issues. Also, all the new cleaning gels etc. are actually a cause of our dishwasher problems.  
So, here is what we need to do:
1. Use Cascade POWDER detergent only.  Make sure is is just "plain" no "scented" or "complete"  or gel, etc. (I have tried a phosphate free powder and gel and this is a cause of our problem as well!) 2. Use Jet Dry in the dispenser (set it to a 2-3 opening) 3. Make sure water is at least 120 degrees 4. Only run dishwasher on "normal" setting.  All others just run it longer, hence causing more water stains. 5. Do not pre-wash dishes! You can knock of chunks with a "non" soapy brush, but don't rinse (the oils actually help to clean the dishes) 6.  Do not wash sponges in dishwasher.
Acid Wash: The repairman just gave my washer an Acid Wash today. It says it is an acid derived from lemon, I got mine from Carters appliance in Torrance, CA for about $19. I am to run a normal cycle with the above mentioned Cascade after this "acid cycle" is finished.
If you are still having problems:
Monthly maintenance: Glass Magic: Buy a box of Glass Magic (near the Cascade)  Use 1 Tbsb in main detergent compartment of dishwasher along with the Cascade, till washer starts working again. White Vinegar: You can run an empty dishwasher with white vinegar once a month.  Fill a bowl with 2 cups vinegar and place on bottom rack.  Then run as a normal cycle...this allows vinegar to disperse slowly.
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1 Answer

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It is very common that high eficiency, low water using dishwashers take longer to finish all cycles. The best way to "hurry" the washing is to make sure that the water heater is providing hot water of at least 120 degrees. But no hotter then 140 degrees.
If the dishwasher runs even longer, check to see is the dishwasher is actually connected to the cold water line. This dishwasher can be run from cold water but the water heating phase in the cycles will add much time ti the entire cycle.

This unit has a sensor that detects the detects the water clarity towards the end of the wash cycle. Rinsing the dishes may speed the load a little, but encourage not to go crazy on the rinsing because the dishwasher actually counts on the food particles to help clean the dishes.
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Hope this helps. Please resply with your findings. Thanks!

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4 Answers

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