Got the dreaded problem draining code too. Just over a yr old. Did the compressed air thing. No luck. It started only having code on Heavy cycle so we used other cycles. Eventually it gave code on all of them. But you could force it to drain. Some. Just put on new pump. Still drain code. I’m betting something electronic. Going to try to drain into bucket test soon with new pump but I bet it’s fine. LG must really stand for “Looks Good” but that’s about it. Won’t buy any of their products again!