Verified boiler fault code
Ideal F3 Fault Code (Logic Combi)
Fan fault.
Safety disclaimer
Fault code summary
- Manufacturer
- Ideal
- Fault code
- F3
- Fault type
- Fan, Flue
- Severity
- high
- Reset
- Ideal recommends restarting the appliance once for this code; do not repeatedly restart an unresolved fault.
- Applicable models
- Logic Combi 24, Logic Combi 30, Logic Combi 35
Quick answer
Fan fault.
What does this fault code mean?
Fan fault.
Common causes
- The boiler fan has a fault.
Symptoms
- The boiler displays F3.
What can the homeowner safely check?
- Ideal's guide says to restart the boiler once; if it still fails, contact Ideal or a Gas Safe registered engineer.
Boiler reset information
Ideal recommends restarting the appliance once for this code; do not repeatedly restart an unresolved fault.
When should I call an engineer?
Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.
Engineer diagnosis
- Assess fan operation and the flue/air path.
Applicable boiler models
Related fault codes
Manufacturer documentation
Ideal Logic Combi Boiler troubleshooting guide‘F3’ on Your Ideal Logic Combi — Fan Fault — simply restart your boiler and it should resolve the issue.
Last verified
2026-09-12
Frequently asked questions
What does Ideal F3 mean?
Fan fault.
Can I reset a Ideal F3 fault?
Ideal recommends restarting the appliance once for this code; do not repeatedly restart an unresolved fault.