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My LG WM3431H All-In-One Washer and Dryer won't dry

Alright - bumping an old thread but I think I have some helpful information to add. Firstly, here is a link to the service manual: http://www.espagle.org/doc/45928217/wm3431xx-service-manual-lg/ .

Second, I must warn you that I am doing this from memory (even through it was this morning).

General note: Take note of what screw goes where. There are 5-6 variations.


1. Unplug the machine, unscrew the hot water, the colder water, and pull out the drain line from the wall (mine was just hanging into a waste water line, I assume some people have threaded connections).

2. Place the machine in a location that gives plenty of room to access the top as well as the back.

3. Remove the two screws which attach the top panel to the back. Slide the top panel towards the back of the machine, remove and place aside.

4. Remove the screws holding on the top cover/heat shield (this part should have a black tar like cover on top to protect from excessive heat). Lift the top cover and place aside.

5. Remove the screws holding on the back cover. Slide the back cover up slightly and pull the bottom of the cover out. This should free the bottom. Slide the panel downward to free the top. Place aside.

Take a look at the top of the machine, there is a large black duct that says something along the lines of "caution hot." Follow that heating duct towards the back of the machine to the circular cover (this is the fan). Now follow that downward to see the condenser duct (previously described as creamish white). This is part we are trying to detach from the rest of the machine and clean out.

In order to remove this duct from the machine we need to disconnect the heating duct/fan assembly, the small black sensor on the front of the condenser duct, the black tube connected to the condenser duct, and all of the screws holding on the duct itself.

6. Remove the screws holding the heating duct to the drum and the condenser duct. If I remember correctly, there are two at the front of the machine, three along the heating duct, and four by the condenser duct. Make sure you are removing the screws holding the entire duct to the drum/condenser and not the screws that split the duct itself.

7. Once the screws are all out, lift the heating duct/fan assembly slightly and tilt it away from the condenser duct. Place the heating duct/fan assembly on the machine with all of the remaining connections untouched.

8. On the top, front of the condenser tube there is a metal sensor attached to a rubber gromet. This needs to be removed from the condenser tube. It takes a bit of work, but it didn't seem like you could easily damage the gromet if you use a screw driver to pry it out.

9. Unattach the black tube at the top of the condenser tube by squeezing the metal clamp and pulling it away from the condenser tube. My washer had a bit of sealant/glue at the connection. I removed this with a set of pliers in order to disconnect the black tube.

10. Remove the screws holding the condenser tube to the drum. There is one on top and numerous on the back. There is one screw that is not accessible by a screw driver and requires a 5/16 socket and ratchet to remove (or some sort of angled screw driver...)

11. This should free the condenser tube. Remove it and clean out all of the lint. I used a coat hanger as well as the garden hose to get out all the lint. Also take this time to clean out any dirt you can access in the fan and the heating duct.

12. Follow these steps backwards to reattach everything, I hope you remember which screw goes where.

Its very likely I will not check back here, so good luck. I hope there arent too many mistakes in my write up!
10/31/2022 1:10:36 PM • LG WM3431H... • Answered on Oct 31, 2022


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