High
E44 on Ferroli Maxima 35 S

Your boiler has detected a disagreement between two internal temperature sensors, meaning it cannot accurately tell how hot the water inside is and has safely shut down to prevent damage.

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

Safety NTC and flow NTC difference

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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