Low
d.67 on Vaillant ecoFIT Pure 425

Your boiler is taking a planned short break between firing cycles to prevent inefficient operation and internal wear.

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

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

From this model's manual
Verified against the Vaillant Ecofit Pure 830 installation & service manual, page 31.
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 10 to 15 minutes for the countdown to finish naturallyEnsure your room thermostat is turned up to call for heatCheck that radiator valves are open to allow heat to dissipate

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