High
117 on Atag Sov.

Your boiler has shut down because there is too much water pressure in the system, which can put strain on the internal seals.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Water pressure is too high (> 3.0 bar). The boiler is taken out of operation. The installation pressure should be reduced by draining water from the heating system.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

118View →110View →

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