Gas boiler keeps running even when turned off!?

When I went to turn off the central heating last night the gas boiler seemed to be still working. In the end I had to switch it off at the socket. Does anyone know what could be wrong. Everything seems to be okay, it's just that it won't go off with the timer box.

Many thanks
Carolyn, February 2005


done
Gas boiler keeps running even when turned off!?

minh, October 2008
MAKE AND MODEL PLEASE

STEVE@B H HEATING, February 2005