BoilerFaultCodesVokera 08 Fault Code
The Vokera 08 fault code means: your boiler has shut down because a specific safety sensor on the burner has detected that it is getting too hot.. It appears on 13 Vokera models in our database.
Technical description: Fault code 08 appears if the burner thermostat has been activated. (only for 35e)
What causes the Vokera 08 fault?
This fault occurs when a safety sensor detects that the metal housing around the burner is reaching dangerous temperature levels. It is usually caused by a lack of water flow through the heat exchanger or a build-up of debris blocking the internal ports, which prevents heat from being carried away quickly enough. In some cases, the sensor itself may have failed or the wiring has become damaged due to the high heat environment.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Vokera models that show the 08 fault code
Click a model for the full fault code list and model-specific repair notes.
- Easi-Heat 25 Repair: £100-£350
- Easi-Heat 29 Repair: £100-£350
- Linea 24 Repair: £250-£450
- Linea 28 Repair: £90-180
- Linea 7 Repair: £90-180
- Linea HE Repair: £100-£350
- Linea Max Repair: £180-450
- Linea Plus AG Repair: £100-280
- Mynute 28E / 35E Repair: £100-250
- Synergy E Repair: £100-250
- Syntesi 25 Repair: £120-250
- Syntesi 29 Repair: £120-250
- Syntesi E Repair: £120-250
Source
Vokera 08 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