I just installed a new Triton Cara electric shower. It was just a straight swap for the old electric shower. I installed and commisioned as per manufacturers instructions and the shower works correctly up untill the temperature knob goes past number 5, 1-5 work fine but when I turn to 6 it overheats, I hear a click and then it starts to go cold telling me the thermal cut out device is working but I dont know whats causing it to overheat in the first place. The flow is fine , stopcock and ballofix fully open, no blockages, electrical connections all seem fine. There was no problems with the previous shower (Triton Topaz) which was also installed by me using the same pipe and electrics . I just want to know if theres someway I dont know of to fix this before phoning Triton. Cheers