Quote Originally Posted by martinw58 View Post
i think replace the units they are7 years old and other components might start to fail
YEs i agree, the price of circuit boards are high across the industry in general, sometimes i come across a PCB that i say wow that was less than i was expecting, but in general they are allways in hundreds of pounds.
There are some cases where its a common fault, and the manufacturer knows that.

Pipes and cable are all in place, time for a new system.