BoilerFaultCodesIdeal F8 Fault Code
The Ideal F8 fault code means: your boiler's internal computer brain either hasn't been set up correctly or has developed a hardware failure, preventing the unit from starting.. It appears on 15 Ideal models in our database.
Technical description: PCB UNCONFIGURED OR FAULTY
What causes the Ideal F8 fault?
This fault occurs when the boiler's main control board has lost its unique identity settings or has suffered an electrical memory failure. It essentially means the computer inside the unit no longer knows how to operate the specific components of your boiler and has shut down for safety. Most often, this is caused by a power surge or an internal hardware defect that prevents the board from reading its own configuration data.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A cover plan would handle faults like F8: no call-out fees, no surprise bills.
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Ideal models that show the F8 fault code
Click a model for the full fault code list and model-specific repair notes.
- Atlantic Combi Repair: £150-300
- EXCLUSIVE2 Repair: £150-300
- i Combi 2 Repair: £250-£450
- INDEPENDENT SYSTEM Repair: £150-350
- Independent System S15 Repair: £250-450
- INSTINCT2 Repair: £150-300
- Logic Air Repair: £150-250
- Logic Code Combi ESP1 Repair: £280-450
- Logic Combi C24 C30 C35 Repair: £250-£550
- Logic Combi ESP1 Repair: £250-£450
- LOGIC HEAT Repair: £250-450
- Logic Max Heat Repair: £250-450
- Logic Max System Repair: £280-450
- LOGIC SYSTEM Repair: £250-450
- Logic+ Heat H Repair: £250-450
Source
Ideal F8 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 31 August 2026