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WM3431HW not drying - LG Washing Machines

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Hi Of all washing machine parts, the water pump probably takes the most punishment, because it is constantly in use. When the pump fails, you can hear or see the trouble: a loud rumbling inside the machine, or a failure of the water to drain out of the tub. Here's what you can do to fix the problem:

WM3431HW not drying - how-to-repair-a-washing-machine-4.jpg
©2006 Publications International, Ltd.
Take the pump apart and clean 
away all debris inside the pump. 
Also clear away debris from 
the water tubes.


Step 1: Check the drain hoses to make sure they are draining properly. Remove the water supply hoses from the back of the washer. With long-nosed pliers, extract the filter screens from the valve ports in the washer or from the hoses themselves. Wash the screens thoroughly. Then replace them and reattach the hoses. If the machine still rumbles or doesn't drain, examine the pump.

Step 2: To access the pump, first bail and sponge out any water in the machine's tub. Then tip the washer over on its front, using a heavy blanket or pad to protect the washer's finish. Remove the back service panel. The pump is usually located along the bottom of the machine, but with the unit tipped on its front it's easier to remove the pump through the back than through the bottom of the washer.

Step 3: Locate the pump. It has two large hoses attached to it with spring or strap clips. If the clips are the spring type, pinch the ends of the clips together with pliers to release them, and slide the clips down the hoses. If the clips are the strap type, unscrew the metal collar to loosen the clamp. Disconnect the hoses by pulling them off the connections. If the hoses are kinked or crimped at these connections, straighten them as best you can and reconnect them. Then try the machine again to see if this kinking was causing the problem. If the machine still doesn't drain, you'll have to remove the water pump.

Step 4: To remove the pump, loosen the bolt that holds the drive belt taut and move the washer motor on the bracket to loosen the belt. Move the motor out of the way and unbolt the pump; it's usually held by two or three hex-head bolts located on the bottom of the pump housing. As you loosen the last mounting bolt, support the pump with your hand. Then lift the pump out of the washer.

Step 5: You should take the pump apart if you can, because the trouble could be lint, dirt, or pieces of cloth or paper clogging the pump impeller. Clean away all debris inside the pump and clear any debris out of the water tubes. Then reassemble the pump. Hook up the pump again and test it. If cleaning the pump doesn't put it back into working order, or if the pump housing can't be removed, replace the pump with a new one of the same kind.

Step 6: To install the new pump, set it into position and connect the mounting bolts to the pump housing. Move the motor back into position. Tighten the drive belt on the motor by prying it taut with a hammer handle or pry bar; it should give about 1/2 inch when you press on it at the center point between the two pulleys.

Step 7: Reconnect the hoses leading to the pump.


Posted on Oct 07, 2008

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I was replacing the pump on my LG WM3431HW... I took the pump motor off from the back side of the washer... since it was hard to reach i was able to unscrew and disconnect the electrical wires. But now since it was hard to see i dont remember which wires go to the new pump. there are 2 connections a brown and a connection with 2 back wires. im not sure which side to connect these. can anyone tell me from looking under there LG combo if the brow is near the outside or if its the 2 black wires that are near the outside of the unit?

Posted on Jul 02, 2012

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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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1 Answer

How do i do drying only


From the document I see, it is only a matter of pressing the "Dry" button. This is from the manual, available at http://www.lg.com/us/appliances/washer-dryer-combos/LG-WM3431HW.jsp and selecting the "Support" tab. On the right, there will be a "Washer/Dryer Combos Manual" link, which will download to your computer. Listed under "Dry" in Section 9 is the following.
• Drying options are easily selected with the Dry button. • For most even drying , make sure all articles in the clothes load are similar in material and thickness. • Do not overload dryer by stuffing too many articles into drum. Items must be able to tumble freely • If you open door and remove load before dryer has finished its cycle, remember to press the Start/Pause button. • By pressing the Dry button, you can select "Normal" - "More" - "Time" - "Off" - "Low Temp" - "Less" • Your dryer can handle a load of up to 9 lbs. (4 kg) dry weight of articles. • When drying cycle is completed, [Cd] (Cool Down) is displayed on the Multi display. • Cool Down is set automatically when the drying cycle is complete. • If clothes are not removed promptly when the drying cycle ends, wrinkles can form. • The Cool Down feature periodically tumbles, rearranges and fluffs the load to avoid wrinkles for up to 4 hours. • The message [Cd] will continue to display until the clothes are removed or the Start/Pause button is pressed
Hope this solves your problem. I highly recommend downloading the users manual, it is a wealth of information and will prove useful in many circumstances.
Please rate and comment Thank You Joe

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1 Answer

LG TROMM WM3431HW(?) soaks clothes in Dry Cycle


LG says to unplug unit. Or remove power by tripping circuit breaker. Wait a minute and plug back in. Good luck.

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1 Answer

Where can i find a free service manual for LG WM3431HW?


Unfortunately you won't find one.

LG only supply their servicing manuals to their repair centres and strictly enforce their copyright, so the manuals are not available to the public and when they do occasionally appear the material has been stolen.

Usually I'd recommend a generic repair manual such as the one by Haynes, but LG's direct drive system and a number of other unique technical features mean that the Haynes book isn't as useful as it could be. The WM3431HW is a large capacity and technically advanced washer dryer so it's certainly not as straightforward to service as a traditional front loading washer or dryer. Many LG spare parts can also be difficult to source outside of their own approved servicing organisation.

I respectfully suggest that you either get LG to fix your machine or post a question on this site describing the problem to see if we can assist you.

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1 Answer

LG WM3431HW is flooding the room


take the lid off
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take the back panel off and check all your hoses
find out what is leaking and then i can help you to take apart further
make sure that you unplug it first though.

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your service manual should be tapped to the wall behind the toe kick in a manilla envelope

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Try checking the back, there is a plastic tub that is connected to the drying system and it can get clogged with lint etc. It will also cause the unit to give you longer drying times. It is a poor design. You can also pop off the lid to get a better look but make sure you unplug the unit.
Sgt 48

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