Would you like to give us a few clues because my crystal ball just went AWOL.
Although we are prepared to try and help other people with their problems, it would be helpful if you told us:
Type of Boiler ie. Conventional, Balanced flue, Combi, Condensing. etc?
Manufacturer/Model?
Gas/Oil?
No heating? Does that mean the domestic hot water is ok?
Is the programmer on?
Is the boiler thermostat up?
Is the room thermostat up?
Is the pump running?
Is there a pilot light light? --Is it lit?
Are the boiler pipes cold/hot?
cledlyn, October 2008