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howcan i fix my vokera 20/80 flowmatic boiler?

burners don,t come on when i put rads on . temp gauge on boiler goesn to 80-85 oc. get the odd klanking noise removed the outer casing it gets very hot & flew is that norm ?
stewart townsley, May 2008
dhw working ok?

tell us what happens sequence up to what does not happen. is the boiler mad hot with no demand, on ch demand, dhw demand???

bit more info needed

iain, May 2008
link Click here to see other fixes for Vokera.