Verified boiler fault code
Ideal F1 Fault Code (Logic System)
Low water pressure.
Safety disclaimer
Fault code summary
- Manufacturer
- Ideal
- Fault code
- F1
- Fault type
- Low pressure
- Severity
- Not specified
- Reset
- Not specified
- Applicable models
- Logic System
Quick answer
Low water pressure.
What does this fault code mean?
Low water pressure.
Common causes
- System water pressure is below the 1 to 1.5 bar range stated in the guide.
Symptoms
This information was not provided in the verified manufacturer source.
What can the homeowner safely check?
- Check the pressure gauge; the guide says to look for between 1 and 1.5 bar.
Boiler reset information
Reset information was not provided in the verified manufacturer source. Do not repeatedly reset 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 system pressure and any continuing pressure loss.
Applicable boiler models
Related fault codes
Manufacturer documentation
Ideal Logic System troubleshooting manualF1 — Low Water Pressure — look at the pressure gauge to see whether the system water pressure is between 1 and 1.5 bar.
Last verified
2026-09-12
Frequently asked questions
What does Ideal F1 mean?
Low water pressure.