Low
E05 on Ariston Bravo 24 MFFI

Your boiler has detected that the water inside the system is getting too cold and has switched on its internal pump to keep the water moving and prevent freezing.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Anti-freeze system, pump only

From this model's manual
Verified against the Ariston Bravo 24 Mffi installation & service manual, page 56.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Ensure power to the boiler remains switched onCheck that the gas supply is activeEnsure the system pressure is between 1.0 and 1.5 barKeep internal doors open if the boiler is in a particularly cold area like a garage

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