BoilerFaultCodesVokera 33 Fault Code
The Vokera 33 fault code means: your boiler has detected that the internal fan is not spinning at the required speed to safely clear waste gases, so it has shut down to prevent unsafe operation.. It appears on 3 Vokera models in our database.
Technical description: fan error (low rpm)
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 33: 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 33 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 33 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