Medium
1068 on Worcester Bosch Greenstar 28CDi

Your boiler is struggling to accurately read either the outside air temperature or the gas combustion quality, which may prevent it from heating your home efficiently.

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

Outside temp. sensor or lambda probe faulty

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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