BoilerFaultCodesIdeal 37 Fault Code
The Ideal 37 fault code means: your boiler's internal communication chip is either faulty or has come loose, causing the system to stop working.. It appears on 2 Ideal models in our database.
Technical description: BIM is defective or not properly connected (contact Ideal Care Technical helpline).
What causes the Ideal 37 fault?
This fault occurs when the boiler's central brain fails to communicate with a small identity chip known as the BIM. This typically happens because the chip has vibrated loose from its socket over time or the electronic components on the chip itself have suffered a terminal failure. Without this connection, the boiler cannot verify which model it is and 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 37 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 37 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