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Discuss Oil Boiler not heating hot water after draining system. in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. Ollmo

    Ollmo New Member

    After emptying the water from the lowest drain valve in the house (Bottom of downstairs radiator) and refilling the system. The radiators warm up fine but the hot water tank doesnt. I have turned on the imersion heater and the hot water created runs out the taps fine but the boiler (Kerosene) will not heat the hot water for the taps, only the radiators.

    Any suggestions would be greatly appreciated.
  2. SimonG

    SimonG Trusted Plumber

    • Like Like x 1
  3. Best

    Best Trusted Plumber

    Airlock if pipes to cylinder have vents, or were manually vented
    • Like Like x 1
  4. offgridman

    offgridman New Member

    Airlock likely. Check for air bleed valves. If none there, crack the highest joints on primary circuit to let air out. Dont undo fully, just enough to let air out.
  5. Brambles

    Brambles Active Member

    Check that the motorised valve is working before chasing air locks
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