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Hello it's my first time - please be gentle... LG tromm front load washers - I have 2 WM2487HRM and a WM2455HG Both (I think) need control boards Trying to find a way to see which control boards interchange with regard to series revisions / newer / older. example: LG WM2487HRM (R=red color) has a PCB# 6870EC9240B found same model washer WM2487H*M with PCB# 6871ER1062G will this (apparently newer revision) interchange? Also I believe I burned them out by operating them in service / continuous tumble wash mode for too long. In each case I forgot I left it on, left house for 30 minutes, came home, smelled strong burning smell, machine comepletely dead. (DEAD dead.) Don't think it was bearing failure. Bearings still seem fine, tubs have no play, no noise. In both cases the control board and outer plastic box was HOT (I'm open to installing a small cooling fan - there are some large heatsinks on these boards and they get almost zero air circulation - and cooling has got to be hampered by the plastic coating on those boards) I tried replacing the fuse in control board of the WM2487HRM (with a slightly larger value than original -it was an odd rating, did not have exact fuse, me impatient). It was much fun cutting the old fuse out of the plastic sealant I must say. Result was smoke / burning smell. *without even turning the unit on* Immediately unplugged. Observation: when bad control board was left in place in each machine, the drum was hard-ish to turn. Some kind of resistance - felt like it was connected to clay - did not spin freely as normal with machine off. It did not matter if machine was plugged in or not. Once the control board was removed, the drum spun freely and easily. Is this some kind of electronic brake / failsafe which somehow operates even with the unit off and unplugged? (like regenerative braking) Additional notes: I had manually readjusted the water fill on both for much higher water level - so that is rises to above the bottom of the rubber door seal. It seems that these machines work FANTASTIC this way, plus it pretty much eliminates the mold issue as plenty of wash water gets run through the rubber seal and it's drain holes. I'm wondering if the additional water somehow causes more load on the motor under normal operation (although I can't imagine that it would). Also, I have wondered if the additional water might somehow cause or accelerate bearing issues - especially with 10 year old machines which might have weak-ish seals... Also I have previously replaced the drain pumps and drain hoses in both (the hoses split suddenly after 10 years, o-ring seal on the pumps start to leak). Little help please with the control board interchange issue? :-) Also, any other constructive suggestions / experience / things to watch out for on the large LG tromm front load series also appreciated. I REALLY like this design and want to make these work. They seem to be engineered pretty darn well (except for the cheap plastic dishwasher drain hose...) Thanks muchly.