WM3997HVA (ASSEEUS) LG Washer - Instructions

The problem ended up being the pump motor which discharges water from the washer. I figured out this was the problem after trying several things. I determined the motor was fine when it was empty. With the unit turned off, if you can rotate the tube with a quick spin and it lights up, probably this is OK. Then I tried to run it again and it went about 1/2 way through the cycle and stopped and started humming again. So I started emptying out the water, which I noticed was about 5 gallons which is way too much. so once empty, I took the pump off by turning unit on side. There are two hoses with hose clamps, and a few screws. Be careful to mark which wire plugs onto which side of the pump. One is brown and one is black. If you take the pump housing off, with the 3 screws, you should be able to pull the motor apart. Mine had water and scum from the wash in it, which was a dead give away that it was the problem.

UNPLUG WASHER.Unscrew 4 screws holding silver plate at back of unit. Remove plate to expose inside of unit. Locate drain hose at bottom of washer tub. Hose connects at front drain, bottom of tub, and at rear at the pressure sensor. Front and rear simply slide clamps down by grasping clamp tabs and sliding clamp off connection point. Disconnect from tub bottom by loosening main clamp with Phillips screwdriver and pulling downward. Have a towel handy as there will be water in the hose, and it will pour out when removing it from the unit. Installation is the reverse of removal. ATTACH THE HOSE ASSEMBLY TO THE DRUM FIRST, THEN FRONT, THEN LASTLY REAR. This order is the easiest way, otherwise you will spend extra minutes trying to get the tub connection to seat properly. Plug it back in (duh), then you're good to go for another 4 years or so until another hole wears in the hose. I have performed this repair on 3 different units, with 4 years being the average lifespan of this part.

Conclusion was that either the control panel or the noise filter (an electrical fuse apparatus)was bad. Disconnected the water line, turned off power, and pulled unit out from cabinets. Determined that voltage was going into the noise filter (white harness) but almost no voltage coming out (red harness). Ordered noise filter. Hardest part was removing old noise filter from dishwasher frame without removing the whole unit from cabinet and turning upside down.One screw holds the part in the frame. With power off, I used a very small ratchet with phillips screw driver. Pried unit out with screw driver on side to the panel front. It has a retaining tab there.Installation was the reverse. Instead of putting screw back the way it was originally installed, I screwed it in from the outside of the frame. Much easier and just as solid. Tested unit with power on. Hooked up water line. Works great. Note: LG dishwahers have a high repair rate and that this part has a high failure rate. This LG unit was two years old. Never had to fix my 15 year old Sears dishwasher. It still works to this day. (I gave it to my daughter.)

Did the repair entirely from the back.- 4 screws back cover comes off. Once you see the Bellows it is obvious what needs to come off and there are other videos on the net showing this. The main things I did differently were 1) Leaned the washer forward and placed 3 2x4 blocks of wood under each back leg. This allowed me to reach under the washer with one hand, and through the back with the other. You need both hands in there ! 2) Uninstalling is easy with just pliers. But on the way back in, I used a pair of Locking Pliers to keep the circular clamp squeezed as much as possible. That seemed the only way to get the bellows back in. Another option would be to switch to screw on Pipe clamps instead of the spring clamps.