Recent content by stang267

  1. S

    Bypass radiator constantly hot + boiler pump constantly running

    Boiler: Potterton Promax 30 SL S plan/ 1HW/1CH zone valve Our bypass radiator by the HW tank is constantly permanently hot regardless of the radiator valve position. If I turn the valves off, it causes the boiler to go into overheat lockout. I've checked and touched the boiler pump and that...
  2. S

    Potterton Promax SL not firing up on Auto

    Make: Potterton Promax SL For the past 3 days, I've noticed that my boiler does not start the ignition sequence when calling for HW/CH anymore, there is no whirring sound. I have to press the Reset button for it to begin the sequence and fire up. I took the casing off just to have a look at...