If the original part is listed as being replaced by another part number (sometimes noted as "r/b") then I'd use that along with PDuff's info about a software error to lean on LG in order to get them to send you new parts. After all, it's their error "that damaged the machine"....
Key phrase there.
"If I damage the machine then LG doesn't have to cover the repair under warranty so I shouldn't have to pay for a repair that is needed because your company's error damaged my machine, right?"
Then be silent.... first one to speak loses.
A smart CSR will ask you to hold and bump you to a supervisor rather than answer that question.