BoilerFaultCodes.com
1-A1 Low Information

Your boiler is currently stuck in a temporary startup phase and is waiting for everything to be ready before it begins heating.

Monitor it

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: Current status: Status code.

What causes this fault?

This code appears when the boiler is performing its internal self-checks and preparing its components before officially starting a heating cycle. It is a normal part of the startup sequence and usually indicates the system is simply waiting for a sensor or fan to reach the correct operating state. If the code stays on the screen, it typically means the control board is waiting for a signal that isn't arriving.

Typical repair cost £0-90 (including labour)

DIY fix possible

Wait 15 minutes to see if the boiler clears the code automaticallyEnsure your thermostat is calling for heat or hot waterRestart the boiler using the power button if the code persists for more than 30 minutes

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Protect yourself from future repair bills

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