BoilerFaultCodesIdeal L2E Fault Code
The Ideal L2E fault code means: your heat pump has stopped working because its internal electrical cooling system has become too hot.. It appears on 1 Ideal model in our database.
Technical description: Inverter High Temperature
What causes the Ideal L2E fault?
This fault occurs when the electrical brain of the heat pump, known as the inverter, gets too hot and shuts down to prevent permanent damage. The most common reasons are a failure of its dedicated cooling fan or the thermal paste that transfers heat away from the electronics becoming dry and ineffective. It can also be caused by debris blocking the air vents, preventing the unit from cooling itself down properly during operation.
This fault is more common during summer heatwaves when high outdoor temperatures make it much harder for the internal cooling system to keep the electronics at a safe operating temperature.
DIY fix possible
Check that the outdoor unit is not covered by leaves, snow, or debrisEnsure there is at least a one-metre clear space around the outdoor unit for airflowTurn the power supply to the heat pump off and back on again to attempt a reset
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Gas Safe Register →Ideal models that show the L2E fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal L2E 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