High
Condensate in boiler on Ferroli Sigma

Your boiler is producing excess moisture internally because it is running too cool or burning gas at the wrong rate.

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

Thermostat set too low. Incorrect gas rate

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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