How much does it cost to fix Vokera error code no. 48?

Typical repair cost for the Vokera no. 48 fault is £150-300 including labour.

no. 48 High

Vokera no. 48 Fault Code

Q: What does the Vokera no. 48 fault code mean?

Your boiler has detected that the exhaust gases are becoming dangerously hot and has shut itself down to prevent internal damage.

Also written as NO48 — same fault.

The Vokera no. 48 fault code means: your boiler has detected that the exhaust gases are becoming dangerously hot and has shut itself down to prevent internal damage.. It appears on 1 Vokera model in our database.

Technical description: Flue Gas Temperature > 80°C for 5s, the Slave board shuts down

Typical repair cost £150-300 (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 no. 48 fault code

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

Condexa Pro Repair: £150-300

Source

Vokera no. 48 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