Posted on 04 Feb 2013
I had the same problem last summer and it took me ages to work out. After a lot of different advice this is what I finally found was the problem. I have microswitches in the taps and one of these has a short circuit, the one that I left 'on' when the tank ran dry. I had to disconnect each microswitch in turn. I did this by disconnecting the wires underneath the sinks, until I found the switch with the fault.Maybe you have the same problem.