BoilerFaultCodesIdeal L6E Fault Code
The Ideal L6E fault code means: your heat pump has stopped working because the internal computer that controls the speed of the motor has detected an electrical fault.. It appears on 1 Ideal model in our database.
Technical description: Inverter Error
What causes the Ideal L6E fault?
This fault occurs when the power electronics responsible for regulating the compressor's motor detect an electrical abnormality, such as a sudden voltage spike or a loss of communication between components. It is often caused by the internal control board failing due to heat stress or an electrical short within the compressor itself.
This issue can be more prevalent during summer heatwaves or periods of extreme cold when the inverter is working at maximum capacity to maintain indoor comfort, leading to increased thermal stress on the electronics.
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 L6E fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal L6E 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