BoilerFaultCodesIdeal P3 Fault Code
The Ideal P3 fault code means: your boiler has detected an electrical safety issue where its internal components are drawing too much power, causing it to shut down to prevent damage.. It appears on 1 Ideal model in our database.
Technical description: Overcurrent Protection Error
What causes the Ideal P3 fault?
This fault occurs when the heat pump’s internal sensors detect an electrical current that is too high, causing the system to shut down to prevent a fire or permanent damage. The most common reasons are a malfunctioning inverter board that can no longer regulate power or a mechanical failure in the compressor or fan motor that causes them to pull excessive electricity.
This fault can be more frequent during summer heatwaves, as the system has to work harder to reject heat, which can cause aging electrical components to overheat and draw more current.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Ideal models that show the P3 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal P3 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 7 July 2026