While fixing my floorboars, I screwed through a water pipe. I thought it was a central heating pipe as the water was dirty. so I flushed out the central heating system forgetting to turn the power off at the boiler. (the boiler wasnt warming the water!) I then discovered that the burst pipe was a hot water pipe so I drained the hot water tank. I carried out the repairs and turned the water back on. Since then the boiler comes on for 5 minutes then turns off. I have drained the central heating system thinking that there is air in the system but it is still not working.

Thankyou for any help you can give.

The boiler is a conventional space saver boiler....about 30years old.

Richard Lowe, July 2009

Thanks for your help. There is a screw on the pump so I unscrewd it a little and it let out a bit of air and some water. The pump then started making some strange noises and then stoped working. I am starting to think that the pump is knackered.

RL, July 2009

Check if pump running and pumping circulation
If no circulation water from boiler than it overheat and will cut out

Mr K, July 2009