I just paid to have my Aqua Rite salt generator transformer and circuit board replaced due to lightning - not covered by warranty. Now it hums terribly and feels very hot. I don't want to have to pay for another service call. I tried the service phone line and they just walked me through the readings saying everything looks fine - but my pool tests as having no chlorine in it at all despite 2 nights of superchlorinating so I'm thinking I have a problem. Any ideas?