BoilerFaultCodesVokera 30 Fault Code
The Vokera 30 fault code means: your boiler's internal computer has lost its programmed settings and no longer knows how to operate correctly, requiring a professional reset of the software configuration.. It appears on 6 Vokera models in our database.
Technical description: wrong parameter from the factory
What causes the Vokera 30 fault?
This fault occurs when the boiler's internal computer system loses track of the fan's speed or the air flow required for safe combustion. It is often caused by a buildup of dust in the fan assembly or a loose electrical connection that disrupts the signal between the components. While it may start as an intermittent glitch, it usually points to a mechanical part that is beginning to fail.
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 →Avoid the next call-out bill
A cover plan would handle faults like 30: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
Vokera models that show the 30 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 30 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 7 July 2026