check that there is water in tank, as it gets feed from it, it might have a frozen pipe and if this is case wrap a hot towel around it to melt ice to see if this works if not then chances are that shower is knackered, has it every been run with no water in it, last time had one like thie it worked out cheaper to buy a new one than to fix, but if you are in the guarantee get triton out, as they coudl probably tell you over the phone what is up with it and how much it would be
darren
February 2009