Low
S.08 on Vaillant Atmomax

Your boiler is currently taking a temporary planned break to prevent it from turning on and off too frequently, which helps protect the internal components.

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

Heating remaining cut off time xx minutes

Shared across the range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
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

Wait for the timer (xx minutes) to count down to zeroEnsure your room thermostat is turned up higher than the current room temperatureCheck that your radiator valves are open to allow heat to circulate

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