Search results

  1. N

    What does this switch do?

    Currentl set to position 1 will try 3 thank you
  2. N

    What does this switch do?

    I have a Grundfosn Selecrtric ip44, class H central heating pump, on the side there is a switch that can be set to any of three positions. can anybody tell me what this does? does it speed up the pump and could it improve the efficiency of my central heating system which, although all the...
Back
Top