Medium
FAIL POINT F on Worcester Bosch 28 RSF

Your boiler is struggling because the surrounding area is freezing, which has triggered a built-in safety mode to prevent internal pipes from icing up.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

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

Boiler in very cold environment (less than 5°C) - Autofrost stat mode. Possible damp control board.

Engineer required

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

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