BoilerFaultCodesYour boiler is performing a routine self-diagnostic test on its internal electrical switches and should return to normal operation shortly.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Relay test was activated
What causes this fault?
This occurs when the boiler performs an automated health check on the internal relays that control electrical components. It is a standard safety procedure designed to ensure that the switches on the main circuit board are opening and closing correctly. The boiler pauses briefly during this cycle and typically resumes normal operation once the test is complete.
DIY fix possible
Wait for 5-10 minutes for the automated test sequence to completeIf the code persists, press the 'Reset' button on the front display panel onceEnsure there is power to the boiler and no recent power cuts have occurred
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