I have emergency cover insurance as part of my home insurance. I called them up & reported that my heating wasn’t working; plumbers came round and said that it was the diverter valve, and that they could not change it because the system electronics was too old. They recommended an upgrade outside of the insurance policy of which I was not to happy. Can someone have a look at the images below and recommend a new electronic box. Please include a link. I know a little about electrics and feel I could upgrade it myself, failing that my neighbor is a retired electrician. Thanks to all.