Low
S.30 on Vaillant Turbomax Plus 824/828E

Your boiler is currently in standby mode because it is not receiving a signal from your thermostat or timer to turn on the heating.

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.

Technical description

No heating demand from external controls

DIY fix possible

Check your room thermostat is turned up higher than the current room temperature.Ensure your heating programmer or timer is set to an 'ON' period.Verify that any smart heating controls are connected to Wi-Fi and not showing an error message.

Find a Gas Safe engineer
Search the official register →

Related fault codes

S.31View →

Related guides you might find useful

Boiler won't turn on — 9-step checklist

Work through these before the call-out.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →