bigdaddy

Hello people. I have a Nahanni 2005 spa and the water temp went down to 45/f. I tried pushing on the teperature button to raise the heat, however, it has been over ten hours now and the heat is still only at 51/f. There are three red dots that are flashing on the control panel that sits on top of the tub. I have changed the filter and I have reset the power by turning the breaker off and then on again. Still cannot get the water any warmer. Does anyone have any ideas? Thanks.