No hot water
Has the boiler stopped altogether, or only the hot water side?
In the next five minutes
- Turn a radiator valve up. Does the heating fire?
- Write down any code on the boiler front.
What he'll want to know
- Pressure gauge near 1 bar, or near zero?
- Does the gas hob light? If not, it may be the supply.
Ring 07123 456789 and read it off the boiler.