Low
P.01 on Vaillant ecoFIT Pure 825

Your boiler is currently running a professional diagnostic test to check it is burning fuel and heating water at its highest power level correctly.

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

Maximum load check programme: After successful ignition, the product is operated at maximum heat input.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

P.00View →P.02View →

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