BoilerFaultCodesIdeal LC6 Fault Code
The Ideal LC6 fault code means: your heat pump has stopped working because its internal computer board is having trouble communicating with or powering the compressor.. It appears on 1 Ideal model in our database.
Technical description: Inverter Error
What causes the Ideal LC6 fault?
This fault occurs when the heat pump's main control system loses the ability to properly manage the compressor, which is the 'heart' of the machine. The most common reason is an electrical failure within the inverter circuit board or a breakdown in the wiring that provides power and instructions to the compressor.
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 LC6 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal LC6 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