Medium
40 on Ferroli Optima 201

Your boiler has detected a temporary temperature issue and is pausing itself to prevent damage, but it should restart automatically once cooled.

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

Temporary shutdown fault - resets automatically as soon as the value comes back within the boiler’s normal working range

DIY fix possible

Check that all radiator valves are fully openCheck the system pressure is between 1 and 1.5 barWait for the boiler to cool and restart automaticallyEnsure there is no air trapped in the system by bleeding radiators

Find a Gas Safe engineer
Search the official register →

Related fault codes

F07View →

Related guides you might find useful

Banging / kettling / whistling noise

Each noise points to a different fault.

Read →

Radiators cold at the bottom

Sludge build-up — needs flushing, not bleeding.

Read →

Yellow or orange flame — CO safety

Safety-critical — turn off, read this.

Read →