BoilerFaultCodesIdeal fault condition Fault Code
Also written as FAULTCONDITION — same fault.
The Ideal fault condition fault code means: your boiler has encountered an internal timing error or electrical communication fault because it didn't enter the correct setup mode when its gas control valves were being linked.. It appears on 1 Ideal model in our database.
Technical description: Failure to enter the commissioning mode will result in a fault condition being detected when actions are carried out while reconnecting power leads to the RH valve.
What causes the Ideal fault condition fault?
This fault is physically caused by an electrical communication error between the boiler's control board and the gas valves during a startup or reset sequence. It typically happens when the system fails to synchronise its safety checks, often due to a loose connection or a failing wiring harness that prevents the components from 'handshaking' correctly. In many cases, this indicates that the internal electronics can no longer reliably control the flow of gas, leading the boiler to shut down for safety.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ideal models that show the fault condition fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal fault condition 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