Low
d.67 on Vaillant ecoFIT pure

Your boiler is taking a temporary, normal breather to prevent itself from turning on and off too quickly, which helps save energy and protect the 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.

Technical description

Remaining burner anti-cycling time (setting under d.02)

DIY fix possible

Wait 10 to 15 minutes for the internal timer to count downCheck that your room thermostat is turned up high enough to call for heatEnsure your radiator valves are open to allow heat to move away from the boiler

Find a Gas Safe engineer
Search the official register →

Related fault codes

d.02View →

Related guides you might find useful

Yellow or orange flame — CO safety

Safety-critical — turn off, read this.

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 →