l3
Moderate
Daikin · Mini-Splits & Ductless Systems
Electrical Component Temperature Rise
Quick Answer
Error code L3 on your Daikin Mini-Splits & Ductless Systems means: Electrical Component Temperature Rise. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Check clearances around the outdoor unit and remove any obstructions
2
Inspect the inverter board heat sink and cooling fan for dust buildup
3
Clean the heat sink fins with compressed air to improve cooling
4
Verify the outdoor unit is not installed in direct afternoon sun or near heat-reflecting surfaces
5
If the issue persists, a licensed HVAC technician should check the inverter board and its cooling system
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Inverter cooling fan
Inverter board
Thermal compound
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