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Recent content by summat

  1. S

    Main 12 HE (discontinued) - Air Proving Lockout

    Hi, 10-12 year old Main 12 HE (similar/same to Baxi & Potterton) boiler feeding CH and indirect cylinder. Last night, gone midnight, prep for bed and realised no hot water. Checked the boiler - and this indicates via three front-panel LEDs (On/Off/Off) a "Air Proving LOCKOUT", see...
  2. S

    Radiators cold, but heating on...

    @GE Sonny: Norstrum Proflush, with a desludger in the system a few days before hand (from memory). Pretty sure 3 port is working (alternating between HW and CH I can feel the appropriate outlet getting hot). F&E is reasonably clean. expansion pipe is hot at the cylinder, but cold in the loft by...
  3. S

    Radiators cold, but heating on...

    Might not be the end of the world - bought a pump-only unit from grundfoss that is supposed to be compatible with the earlier one, but couldn't the old one didn't fall apart as it should have. Meant I ended up buying a complete pump assy, so with this being only 6 months old it should be easy to...
  4. S

    Radiators cold, but heating on...

    Hi, new poster, and a DIYer that just doesn't understand water. I've a 20 year old house with Y-plan system, bit of a Trigger's broom (I've previously separately replaced the pump, 3-port valve, cylinder, plumber replaced the boiler... but the pipe-work is all original!) Oh, 12mm microbore...
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