Low
S.08 on Vaillant Turbomax Plus 828

Your boiler has reached its required temperature and has temporarily paused to prevent it from switching on and off too frequently, which protects the internal components and saves energy.

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 cycling mode (heating operation)

From this model's manual
Verified against the Vaillant Turbomax Plus 824 828e installation & service manual, page 38.
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 up to 15 minutes for the 'anti-cycling' timer to finish; the boiler will restart automatically.Check that your room thermostat is turned up higher than the current room temperature.Ensure your radiator valves are open to allow the heat to dissipate effectively.

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