my Aqualisa Quartz Digital can not be switched on, the led ring is on constant on (like when it is working and reached the temperature) but no water is flowing, cant switch water on or the leds off... I switched the fuse box off to cut power, but problem remains.

What is the problem (the digital processor?) and how can I fix it?

Steve, December 2008

I have the same problem. It seems to be related to the temperature in the loft, if that is where it is. When it is warmer than -2 it works for me.

Tim, January 2009