High
F.72 on Vaillant ecoTEC Plus 610

Your boiler has detected that the water temperature is not moving through the system as expected, which prevents it from working reliably.

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:Deviationinthewaterpressuresensor/returntemperaturesensor | Flow/returnNTCtemperaturedifferencetoogreat→flowand/orreturntemperaturesensordefective

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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