Hello i wonder if anyone can help with this, i went to switch my central heating on last night and the radiators failed to heat up, i still had hot water and have a combi boiler. i have been plauged with central heating and boiler problems since moving in to my house 4 years ago, and about 18 months ago got this new combi boiler. i have checked the water level ans all is ok. i have had a little fiddle with various switchs but to no avail. i also relised that the noisy pipes were silent when i attempted to switch the heating on. any ideas?