I have a 2004 Down East Spa made by Master Spas. The Balboa heater tube was leaking around the connection were it attaches to the board. I replaced it with a new heater tube which came with new temp sensors which pluged into the board. Now I get the SNS error code without a temp flashing with it. From what i could find it says the temp sensors are out of sync but of course it does not tell you how to sync them any help would be appreciated.