donnabw

We filled the hot tub with water from outside of the house, which at the time, it was about 35 degrees(f). It has been running for about 15 hours now and the water is still frigidly cold. The heating light is on, but there are 3 flashing lights under the temperature on the display. Is there something I am doing wrong, or will it just take many more hours to heat up. Also, what do the 3 flashing lights mean?