Boiler error codes differ between manufacturers and models. Here are some commonly encountered codes from leading UK boiler brands.
Some boiler problems have simple explanations. These basic checks may help you identify the issue before arranging professional assistance.
Many sealed systems operate around 1–1.5 bar when cold. Check your boiler manual for the correct pressure range.
Check that the boiler is switched on, the display is working and the external power switch is on.
Make sure the thermostat is set above room temperature and the heating schedule is active.
During freezing weather, an external condensate pipe may freeze and prevent the boiler from operating.
We provide fast, reliable plumbing and heating services across South West and Central London, covering both residential and commercial properties.