BoilerFaultCodesIdeal 7F Fault Code
The Ideal 7F fault code means: your boiler's internal computer has lost power or suffered a hardware failure, meaning it cannot control the heating or hot water functions.. It appears on 1 Ideal model in our database.
Technical description: Defective control panel or blown F3 fuse.
What causes the Ideal 7F fault?
This fault occurs when the boiler's main control board loses electrical power or suffers an internal hardware failure. The most common reason is a blown fuse on the board caused by an electrical surge, though it can also happen if the circuit board itself has simply worn out and can no longer process commands.
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 7F fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 7F 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