BoilerFaultCodesIdeal VF Fault Code
The Ideal VF fault code means: your boiler is currently running a self-cleaning cycle to remove air bubbles from the pipes and will return to normal operation shortly.. It appears on 4 Ideal models in our database.
Technical description: To activate the venting function
What causes the Ideal VF fault?
This code appears when the boiler detects that it needs to purge trapped air from within the heat exchanger or pipework to ensure efficient operation. It is often triggered automatically after the system has been refilled or if internal sensors detect air bubbles that could lead to overheating. The boiler isn't broken; it is simply performing a routine maintenance cycle to protect its internal components.
This is more common in autumn when homeowners first bleed their radiators or top up the system pressure ahead of the heating season.
DIY fix possible
Wait approximately 5 to 7 minutes for the automatic venting process to complete.Ensure the boiler pressure gauge is between 1 and 1.5 bar.The boiler will restart its normal heating and hot water functions automatically once finished.
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Gas Safe Register →Ideal models that show the VF fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal VF fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026