Clunking noise when my boiler starts?
When my boiler (Thorn appollo 30/50) starts it makes a kind of clunking noise, sounds like an airlock in the pipes (But I have checked that)then it runs for as long as i want.The problem begins if I switch the boiler off it will not restart for around six hours it just makes the usuall clunking noise then switches off each time i try to start it
icam, January 2010
