DHW thermistor fault Medium

Vokera DHW thermistor fault Fault Code

Also written as DHWTHERMISTORFAULT — same fault.

The Vokera DHW thermistor fault fault code means: your boiler is struggling to accurately measure the temperature of the water being heated for your taps, which prevents it from providing consistent hot water.. It appears on 1 Vokera model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Solid (ON every 0.5-secs)
Typical repair cost £120-180 (including labour)

Engineer required

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

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Vokera models that show the DHW thermistor fault fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Vokera DHW thermistor fault fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026