I haven't had issues with my lg washer but I have had issues with any dehumidifier with a drain pump and all 3 pumps were victims of the same issue, gunk builds up inside the pump making it work harder leading to early failure. I decided that after the second dehumidifier and 3rd pump that I'd just use gravity to drain the water to a bigger, more powerful condensate pump and although the same gunk builds up, it's not enough to kill the pump...at least not so far.

I see that this model can't do what I did but my guess is if you are to buy another machine, ensure that the pump is at least stronger. In my opinion, if the pump is only $30 bucks, I'd buy a few to keep around and clean the machine more often, a new set is not cheap and they are built to break just the same.

Are you exceeding the head height for the pump? Or coming close? A more powerful pump might help. Also, is there a check valve either built in or in-line?

I got so sick of replacing the pump in ours i replaced the washer. Mine was 13 years old i believe, and I replaced the pump 6 times i think. Half of them in a year or so.

Are you mixing multiple cleaners/detergents?

Clogged or constricted filter, drain components above the filter, or drain hose seem like the most likely cause of failure.

Have you checked the drain hose for gunk, kinks or compression?

Maybe gunk between the filter and the washer drum? Or a bad seal at the filter letting junk into the pump?