Low
P13 on Ferroli Leb TS

Your boiler is currently running a scheduled high-temperature cycle to ensure your stored hot water is kept clean and hygienic.

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

Water tank sterilization period

From this model's manual
Verified against the Ferroli Leb Ts installation & service manual, page 9.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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