How much does it cost to fix Vokera error code 90?

Typical repair cost for the Vokera 90 fault is £0-120 including labour.

90 Low

Vokera 90 Fault Code

Q: What does the Vokera 90 fault code mean?

Your boiler has paused operation due to a temporary internal communication or sensor error that may clear itself or indicate a service is needed.

The Vokera 90 fault code means: your boiler has paused operation due to a temporary internal communication or sensor error that may clear itself or indicate a service is needed.. It appears on 3 Vokera models in our database.

Technical description: Temporary fault code (Refer to section 7.10)

What causes the Vokera 90 fault?

This fault occurs when the boiler's internal computer receives an inconsistent or 'out of range' signal from one of its heat sensors. The most common reason is that a sensor is starting to fail or there is a temporary breakdown in communication between the sensor and the main control board.

Typical repair cost £0-120 (including labour)

DIY fix possible

Turn the selector switch to the 'OFF/RESET' position.Wait approximately 30 seconds.Turn the selector switch back to either the 'Heating' or 'Hot Water' position.

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Vokera models that show the 90 fault code

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

Source

Vokera 90 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