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  1. C

    pressure drops to zero every few hours

    I have to keep topping up with water to 2.0 bars as keeps dropping to zero after approx 2 hours. no apparant leaks. What should i do? what happens if left overnight with low pressure? Also see earlier posting re Vailliant Boiler
  2. C

    Vailliant vcw sine 18 t3- help!

    Boiler is old, but never been any problems, until yesterday when red lit elec light went out and didn't have heat and hot water for nearly 1 hour, then just came back on. Gas enginer came out this morning and couldn't find and electrical fault and has worked ok since. Also, pressure was low...
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