Hi, So I’ve been running the Dolphin to get my pool sparkling. It was a success. Last week I noticed it would stop running, I would gently pull it and it would start back up. Well, now it has quit completely. I have disassembled it and a section of the cover on the cord (inside the dolphin) is pulled apart. Does this mean a new cord might solve my problem? And do I need to have an electrician install it? Thanks up front for your great thoughts and advice.