After ten minutes or so of being switched on, the red light comes on and the boiler automatically switches itself off. Have to leave until it cools down before switching it back on - it then works again for a short period of time before the same happens again.

Boiler 5 years old approximately.

Any suggestions appreciated!

Les, September 2011

Thanks for the reply,

The problem is with both...

Les, September 2011

is the fault whilst running hot water or central heating or both?

A1, September 2011