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Brian, Plumber
Category: UK Plumbing
Satisfied Customers: 840
Experience:  16 yrs. experience as plumber, including full bathroom and kitchen installations.
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Just changed expansion vessel as old one wouldn't hold

Customer Question

Hi just changed expansion vessel as old one wouldn't hold pressure now boiler won't start up have checked both reset buttons thermo Santa reset had tripped reset it boiler started then tripped out again after 1 min max now won't reset on button was working fine before boiler is firebird c20 fitted in 09
Submitted: 1 year ago.
Category: UK Plumbing
Expert:  Brian replied 1 year ago.

Hi C20 What please system or combi?

I presume you are saying Thermostat overheat had tripped so

If it has isolating valves inline make sure they are open, make sure the pump is working unscrew the big screw in the middle to bleed it out.

its probably not resetting as its was too hot.

Take the pressure down to 1 bar when cold please. 3 bar is way over pressure and will open the PRV when it gets hot.

Customer: replied 1 year ago.
Hi Thanks is now running fine pressure is at 2bar when running hot will reset tomorrow as now have a couple of themostatic rad valves not opening.
Expert:  Brian replied 1 year ago.


Merry Christmas

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