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boiler problems

https://forums.diydoctor.org.uk/viewtopic.php?f=177&t=20846

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boiler problems

Posted: Wed Dec 09, 2009 9:09 am
by ollyburton
i have a alpha280e combi . when cold pressure is 1bar turn on heating half way pressure rises to 3+bar then blasts off then when cold again presure is too low 0.5 any ideas please.
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vapormatic vaporizer

Posted: Wed Dec 09, 2009 8:04 pm
by rosebery
Expansion vessel. Either requires recharging or you have a worn out diaphragm.

Cheers
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