BoilerFaultCodesIdeal Boiler sensor Fault Code
Also written as BOILERSENSOR — same fault.
The Ideal Boiler sensor fault code means: your boiler has detected an issue with its internal sensors and has stopped running to prevent any damage or incorrect temperature readings.. It appears on 2 Ideal models in our database.
Technical description: The diagnostics will indicate the nature of the fault to assist a speedy and effective repair
What causes the Ideal Boiler sensor fault?
This fault occurs when the boiler's internal sensors stop communicating correctly with the main control board. It is usually caused by an electrical failure within the sensor itself or a loose connection in the wiring that prevents the boiler from safely monitoring water temperature. Because the boiler cannot tell how hot the water is getting, it shuts down as a safety precaution.
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 Boiler sensor fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal Boiler sensor 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