BoilerFaultCodesTechnical description
Maintenance interval expired
What causes this fault?
This code appears because your heating engineer set a specific time interval or operation limit during the last visit to ensure the appliance is maintained correctly. It is not a mechanical failure, but rather a built-in timer that has reached its end date to help you stay compliant with your manufacturer's warranty. Once the engineer completes the annual safety checks and cleaning, they will reset this timer to clear the message.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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