New to Spas

Yes....Working on it today fond the issue. The relays were very dirty on the PC Board. Cleaned contacts and it is working. Thanks

Help with the understanding of how they work. I was given a 1997 DYNASTY DYN2000Hot tub. Was told it was working before disconnected. As far as I can tell everything except the heat is working. I ohmed the heater out and it was 12 ohm. I understand that is good for this heater. I just am not getting voltage to it. Where to start. No errors on the control pad. I understand overheat freeze protection pressure all play a part. But there are no errors to indicate any issues there. where next. Thanks