Low
d.25 on Vaillant ecoFIT pure

Your boiler is currently receiving a signal from your thermostat to heat your stored hot water or maintain the temperature for quicker hot water delivery.

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

Status of the requirement to reheat the cylinder or for the hot water warm start from the eBUS thermostat

DIY fix possible

Check your thermostat or cylinder timer settings if the water is getting too hotAdjust the 'Warm Start' function on the boiler control panel if you wish to disable this pre-heat featureMonitor the boiler to ensure it returns to heating mode once the water is up to temperature

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