At a glance

  • Copy every letter, number and symbol exactly.
  • Check only the homeowner guidance for your exact model.
  • Do not repeatedly reset a fault that returns.

Record what the boiler is showing

Write down the full code and any accompanying words or symbols. Note whether heating, hot water or both have stopped, whether the message is constant and when it first appeared. A safe photograph of the display can help the office understand what you are reporting.

Do not assume the same code has the same meaning on a different brand or model. Some displays show operating statuses as well as faults. Use the official user manual that matches your exact appliance.

Follow only normal user instructions

The user guide may explain checks involving the ordinary controls or a single reset. Follow those instructions only if they clearly apply to your model and you can do so safely. Do not remove covers, touch internal components or follow an installer menu.

A reset that briefly clears a code has not necessarily repaired the cause. If the message returns, record what happened and arrange an assessment instead of continuing to reset it.

Give the repair team useful information

Provide the make, full model, code, property postcode and a description of the symptoms. Mention recent work, pressure changes, leaks, unusual noises and whether the home has another source of heating or hot water.

The code can guide fault finding, but parts and price cannot be confirmed from the code alone. An engineer may need to test the appliance and system before explaining the repair options.

Your quick checklist

  • Complete code copied
  • Heating and hot-water status
  • Full boiler model
  • When the message started
  • Any recent work or repeated reset
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Further reading

For appliance instructions, always use the manual for your exact model. These official sources provide further background.