I went to enter my hottub to find the water temperature hotter than it should be. The topside control read 82 degress and was flashing and the heater was running. I turned off power and let it cool down for two days. Returned power and nothing will work now. I have replaced the fuse and still nothing. When I flip the powerswitch on the hydrquip you can hear contacts but nothing else. How do I know if it is the topside control or the pack?