My boiler sometimes works fine. Then all of a sudden the next time I switch the heating on the boiler tries to light, but all I hear is a clicking sound. I have had a man out to look at it and everytime it has started working again. I don't want to go through winter like this! Has anyone any ideas? thanks xx

liz, November 2006

I have same problem. Cleaned starter but it works fine. It's like there is a weak or intermittent earth.

Anon, October 2008

Try cleaning pilot assy and probe

Kev, November 2006