Can anyone tell me what impact running a circulation pump with a larger diameter bore would have?
Currently running an old grundfos 15-6 on 22mm with 1 1/2 threads but looking at a lowara ecocirc 25-6.
Problem: Circulating pump failed - new pump fitted - now the boiler seems to randomly fire up regardless of requests for heat. i.e. can turn controls to "Off" but boiler keeps firing.
I have an elderly but usually reliable heating system. It has evolved over the years and now consists of: Ideal...
