BoilerFaultCodesIdeal F3 Fault Code
The Ideal F3 fault code means: your boiler has detected an issue with the fan that pushes exhaust gases out of your home, causing the system to shut down for safety.. It appears on 13 Ideal models in our database.
Technical description: Fan Fault
What causes the Ideal F3 fault?
This fault occurs when the boiler's internal computer can no longer control or receive speed signals from the fan that removes combustion gases. The most common reason is that the fan motor has physically burnt out or suffered a mechanical failure, though it can also be caused by loose electrical connections or a fault on the main control board. For safety, the boiler will stop firing immediately if it cannot confirm the fan is spinning at the correct speed.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Ideal models that show the F3 fault code
Click a model for the full fault code list and model-specific repair notes.
- Atlantic Combi Repair: £180-350
- Concorde Repair: £250-450
- GB24 / GB30 Repair: £180-350
- i Combi 2 Repair: £250-£450
- Instinct2 24 Repair: £220-£450
- Logic Air Repair: £300-800
- Logic Code Combi ESP1 Repair: £280-£450
- Logic Combi C24 C30 C35 Repair: £240-£450
- Logic Combi ESP1 Repair: £280-£450
- Logic Max Combi Repair: £280-£450
- Logic+ Heat H Repair: £250-£450
- Logic+ System Repair: £280-450
- Vogue Repair: £250-£450
Source
Ideal F3 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 7 July 2026