So last week my father and I built my 6 tub 41qt sterilite rack. It's heated by (6) pieces of 12" wide THG heat tape. They are all wired together in a single circuit. The problem is that the tape isn't heating up at all. I've got a herpstat 1 on it and it's like the tape isn't getting power at all. The connections are all good because we tested with the little red/black volt meter. Any ideas?