Oldparkedcars

Hi guys, I suspect my trusty saluspa plug got hot and melted from using an extension cord that's not have duty enough. The company replaced my unit, but I'd like to make it a good spare. I saw the replacement plug on Amazon but wondered if I need to replace more burned wire at the same time. Or do I need to open this up to investigate? Thanks! I'm excited to keep this baby running for years and contribute to the community. Ben from Portland.