Low
E05 on Ariston Egis 24 MFFI

Your boiler has sensed that the temperature inside is very low and has automatically turned on the internal pump to prevent the water from 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 your electricity supply to the boiler remains switched on.Verify that your external condensate pipe is not frozen or blocked.Open any radiator valves in cold rooms to help the water circulate.Check that your main gas supply is active so the burner can fire if the temperature drops further.

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