WT4870CW LG Washer - Overview

I first tested the motor per the service manual. I checked the resistance between the terminals of the 3 pin connector. It's supposed to be 5-15 ohms. The motor checked out so I replaced the main electrical board. It turns out that wasn't the problem. After a brief web search I found out that the hall sensor (which is attached to the motor stator) was the likely cause of the failure. I replaced that and everything works great now. And now I have a spare main board in case that ever fails. I also want to mention that I took the time to remove the dispenser box (where the water comes in and is directed to the different cleaning products) and cleaned it with a very strong bleach solution. It got rid of the mildew and funky smell. It seems that the fabric softener caused a lot of mildew to form inside the dispenser directly above the fabric softener tray. The bleach took care of that. This is probably something that should be done routinely to keep the mildew from forming.

Removed back of washer with screw driver, Removed outer motor cover with a 17 mm socket (1 bolt), Removed motor stater using 10 mm socket (8 bolts). Left motor plugged in and and tipped to the side exposing the sensor. Unplug and snap off sensor. Reassembled in opposite order. Machine works great. Very easy fix, and perfect fit on part.

I first thought there was a mechanical problem but after checking everything mechanical I discounted that idea ... I researched and found out from others with a similar problem that the Le code display was probably a sensor problem ... I ordered a replacement sensor ... With the new sensor available, I removed the access panel to the back of the machine (phillips head screw driver - 4 screws) ... Remove the exposed motor half (1 bolt - 17mm scocket) ... Loosen the motor stator that has the wired coils (10mm socket - 6 bolts) ... Hold motor unit to the side without disconnecting the wiring harness ... Disconnect the sensor wire connector and remove the old sensor ... Clip the new sensor in place (same position as the old one) and re-connect ... Reverse the assembly procedures ... This fixed the problem and the washing machine works like a new one ... The wife is HAPPY!