Medium
E.02 – .48 on Baxi 800

Your boiler is having trouble communicating with your thermostat or smart home hub, meaning it cannot receive the command to turn on the heating.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Configuration to external device unsuccessful – check pairing to external device.

DIY fix possible

Check batteries in your wall-mounted thermostat and replace if necessary.Ensure your internet router and smart home hub are switched on and connected.Try to re-pair the thermostat with the boiler following the manufacturer's pairing instructions.Reset the boiler by turning the selector knob to 'R' for five seconds.

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