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  1. M

    Noisy Central Heating Pump

    After draining the central heating system about 7 weeks ago the central heating pump is now noisy due to air in the system, info to help diagnosis as follows - All radiators are working upstairs and down Bled the radiators regularly but only a small amount of air released. Bled the pump but...
  2. M

    Air lock in central heating system

    Can anybody give advice, i drained the central heating system today and fitted 1 TRV downstairs and 4 TRV's upstairs, filled up the system, added inhibitor, bled the radiators and now the upstairs radiators are hot but downstairs are cold, there is air circulating around when the pump is running...
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