BoilerFaultCodesIdeal J6E Fault Code
The Ideal J6E fault code means: your heat pump’s internal power control system has encountered an electrical fault, preventing the unit from heating your home.. It appears on 1 Ideal model in our database.
Technical description: Inverter Error
What causes the Ideal J6E fault?
This fault occurs when the internal electronics that manage the power sent to the compressor fail or detect an electrical surge. It is usually caused by a component failure on the control board or the compressor itself becoming electrically unstable, meaning the system can no longer safely regulate the motor's speed. Because the heat pump cannot vary its power output, the entire system shuts down to prevent further electrical damage.
This fault can be more frequent during periods of extreme external temperatures when the compressor is required to run at its highest power capacity for long durations.
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 J6E fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal J6E 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