How can I fix a Triton t80 si?

The temp on the shower kept fluctating but it worked, then the water supply was cut off due to a burst pipe, but I had tried the shower unaware of the pipe. Later that day when the water supply came back on the shower still did not work. We have tried various things to get rid of an air block but that hasn't worked is there any thing else it could be?

Jamie Parker
September 2006