How much does it cost to fix Vokera error code E 37?

Typical repair cost for the Vokera E 37 fault is £120-180 including labour.

E 37 High

Vokera E 37 Fault Code

Q: What does the Vokera E 37 fault code mean?

Your boiler has lost the ability to read the temperature of the water returning to it, so it has safely shut down to prevent overheating.

Also written as E37 — same fault.

The Vokera E 37 fault code means: your boiler has lost the ability to read the temperature of the water returning to it, so it has safely shut down to prevent overheating.. It appears on 1 Vokera model in our database.

Technical description: Open circuit on return sensor

What causes the Vokera E 37 fault?

This fault occurs when the boiler's control board can no longer read the temperature of the water coming back from your radiators. It is usually caused by the internal sensor failing due to age or a loose electrical connection between the sensor and the main control unit. Because the boiler cannot monitor its own temperature, it shuts down as a safety precaution to prevent overheating.

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 E 37 fault code

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

Hydra Repair: £120-180

Source

Vokera E 37 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 27 April 2026