I just installed a new heater relay board on my 2004 hot springs hot tub but when I power the tub on, a green led lights on relay board and a red led light right next to it goes on and off every second making a loud click each time. The jets work, the circulation pump is running but the heater is not. I'm concerned about leaving it on as it seems like a relay switch is tripping and resetting itself rapidly and I don't want to damage the new heater relay board. Any ideas?
Thanks