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  1. M

    Gas combi boiler increasing pressure & switching off

    British Gas replaced the "overheat stat" and "thermistor" last Thursday and our boiler has been working flawlessly for over a week now. All included in the £99 fee. Yes, we also pay £20 p/month to get this deal, but we think it's worth it for the peace of mind. We think this price plan works...
  2. M

    Gas combi boiler increasing pressure & switching off

    I will be asking this plumber for an explanation as to why he disconnected our gas. In the meantime, I have called British Gas and am weighing up their 2 options:- 1) £99 repair + £20 p/month (12 month contract) 2) £69 0-30mins repair / £189 30-120mins repair / £349 120+mins repair (one-off...
  3. M

    Gas combi boiler increasing pressure & switching off

    Thanks for the reply. I will search for the Expansion Vessell tests we can try. In the meantime, it has been suggested elsewhere that it maybe the "overheat stat". How much would it cost a plumber to replace either of these parts please? Another plumber visited today and said our boiler...
  4. M

    Gas combi boiler increasing pressure & switching off

    Thanks for the reply. Are there are easy tests I can try to see if it is definitely the Expansion Vessel please?
  5. M

    Gas combi boiler increasing pressure & switching off

    Hi all - the original problem was a combination of the water pressure decreasing sometimes and increasing other times, both resulting in the boiler making a 'click' sound & the pilot light going out within an hour or so. We have bled all radiators and cannot see any visible signs of leaking...
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