Low
d.58 on Vaillant ecoFIT Pure 435

Your boiler is currently set up to allow an external solar heating system to pre-heat your water, which is a status message rather than a breakdown.

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

Solar circuit reheating

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

Check your solar thermal control panel to ensure it is operating correctlyMonitor the boiler to see if the code clears once the solar cylinder reaches temperatureIf you do not have solar panels installed, contact an engineer to adjust the internal software settings

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