Hello, I have a 2003 Bahia (Sweetwater) I am getting oH error code then goes into shutdown. All jets work good, Pump 1 and 2 seem good. Doesnt seem like im getting proper flow out of circulation pump. The low pressure jet where heat usually comes out seems to have less than normal flow. When I turn power on jets turn on and runs untill jets turn off. Then heater light turns on, element gets hot, I hear some clicking and tubeing comeing out of heater element seem to jump. Then I get oH signal followed by shutdown mode ---. Is this circulation pump, thermostat, hilimit sensor? I tried purging out airlock many times with no luck. Any help would be greatly appreciated. Thanks.