Appliance wont fire High

Vokera Appliance wont fire Fault Code

Also written as APPLIANCEWONTFIRE — same fault.

The Vokera Appliance wont fire fault code means: your boiler is failing to start because it cannot detect a demand for heat, the water pressure is too low, or an internal electrical fuse has failed.. It appears on 2 Vokera models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: External wiring fault (Disconnect external wiring and fit link between 1 & 2), Insufficient system pressure (Ensure pressure gauge is above 0.5 BAR), or Blown fuse (Check and replace)
Typical repair cost £90-180 (including labour)

DIY fix possible

Check your pressure gauge; if it is below 1 bar, use the filling loop to top it up to 1.5 barSwitch the boiler off at the fused spur, check the 3A fuse in the plug or spur, and replace if it has blownTurn off your room thermostat and timer to see if the boiler resets; if it fires, the issue lies with your external controls

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Vokera models that show the Appliance wont fire fault code

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

Source

Vokera Appliance wont fire 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