What to do
- Reset the boiler
Ideal's Logic Combi guide says a restart should clear it.
When to call a Gas Safe engineer
If the code comes back, contact Ideal quoting F3: it needs an engineer visit. Outside the warranty, use a Gas Safe registered engineer.
A repair visit will usually check the fan, its wiring and the flue.
- Note the model and serial number. They're on a label on the data badge, usually under the boiler or behind the front cover.
- Write down the exact code, and what the appliance was doing when it appeared.
- Check whether it's still under warranty. If it is, the repair may cost you nothing.
Quick answers
What does the Ideal F3 fault code mean?
There's a problem with the boiler's fan. Ideal says the fan pushes gas up and out through the flue.
Can I fix Ideal F3 myself?
Engineer only (about 5 minutes to reset). Start with: reset the boiler. If the code comes back, contact Ideal quoting F3: it needs an engineer visit. Outside the warranty, use a Gas Safe registered engineer.
Is Ideal F3 worth repairing?
Get a quote first. If a restart doesn't clear it, an engineer needs to look at the fan. Ask for a price first, especially on an older boiler.
Checked against
- Ideal Heating: what does my boiler fault code mean
- Ideal Heating: Logic Combi 24, 30 and 35 troubleshooting guide
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.