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sime friendly e wont fire with the inner cover fitted, works fine when not ?

what can i try ?
alan, July 2009
check fan is clean, venturie in the flue is clear.
Sounds like there is not enough air pulling through the boiler, so check the above and the flue out side no leaves in it?

erj Plumbing, July 2009
link Click here to see other fixes for Sime.