“What's the difference between this and the WM3900HWA? Why is this cheaper even though it's newer?”
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Cycle, options, and software aside, one can find that the WM3900 weighs 202.8 pounds while the WM4000 weighs 187.4 pounds. I suspect some metal parts in the 3900 have been replaced with plastic in the 4000. This is not necessarily a bad thing - it just depends on exactly which parts were changed or deleted from the design. I did call LG and specifically ask if some metal parts had been changed for plastic, but I was not able to find out what specific parts had been changed.
Sorry, there was a problem. Please try again later.Please see the side by side comparison of available specifications for both unit. ^Daphane https://www.lg.com/us/compare?bizType=B2C
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