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baxi 105e combi boiler?

boiler wont modulate when central heating is on causing pressure to exceed 2.5bar, is it the electric safety system or gas valve faulty?.
gaz t, September 2011
Pressure vessel need to charge and pressure to be zere when doing. Most likely vessel diaframe may be punchered and new onecan be fitted any where in heating pipes as existing is difficult to replace

k, October 2011
your pressure need charging or faulty

k, September 2011
its pressure vessel need recharge ,need to drain systerm

ltd, September 2011
link Click here to see other fixes for Baxi 105e.