Simple boiler checks before you report a fault:
Is the boiler gas or electric?
Have you checked if there are any supply problems in the area?
Is there sufficient credit on your card if you have a prepayment card?
Is there a fault reading flashing on the display? If so, do you have the manual for the boiler?
Is the thermostat in the correct position?
Are the radiator valves open correctly?
Is the boiler coming on at all? If so, is there a banging noise?
Is there a pressure reading? If so, what does it say?
Many of the boiler manuals can be obtained online at the following websites:
Potterton – www.potterton.co.uk
Ideal – www.idealboilers.com
Worcester – www.worcester-bosch.co.uk
Valiant – www.vaillant.co.uk