Hi, I've got an Aqualisa quartz digital shower which was fine for four years until a couple of days ago. I had been on holiday so it hadn't been used for a week, when I press the start button nothing happens at all, no light or water flow. I have been up in the loft and checked the fuse on the switched spur and also on the circuit breaker between the spur an the processor unit, both are fine. The only sign of life at all is when pressing the test button on the breaker the boost light on the shower comes on, but only for a second then as soon as I take my finger off the test button on the breaker it goes out again. Also the processor unit whirrs for a second as if it is trying to start up, but then stops again. Any ideas? I'm not even sure this should be on here and not on the electrical forum instead?