BoilerFaultCodesIdeal Spare PCB Not Set Fault Code
Also written as SPAREPCBNOTSET — same fault.
The Ideal Spare PCB Not Set fault code means: your boiler's computer brain has been replaced or reset and needs to be told which specific model it is controlling before it can start working.. It appears on 5 Ideal models in our database.
Technical description: Contact Installer
What causes the Ideal Spare PCB Not Set fault?
This fault occurs when a newly installed circuit board has not been configured to recognize the specific power output of your boiler. Because the same spare part is used across multiple models, the boiler remains in a safety mode until it is told exactly which version it is operating. This usually happens immediately after a repair or if the internal memory has been corrupted by a power surge.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Ideal models that show the Spare PCB Not Set fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal Spare PCB Not Set 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 27 April 2026