High
F.83 on Vaillant ecoTEC Plus 610

Your boiler is not detecting enough water circulating inside the system to safely turn on the burner.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Fault:Dryfire | Whentheburnerstarts,thetemperaturechangeregisteredatthefloworreturntemperaturesensorisnon-existentortoosmall:Insufficientwaterintheproduct,thefloworreturntemperaturesensorisnotinthecorrectpositiononthepipe

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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