a5
Moderate
Daikin · Mini-Splits & Ductless Systems
Freeze-Up / Overheat Protection
Quick Answer
Error code A5 on your Daikin Mini-Splits & Ductless Systems means: Freeze-Up / Overheat Protection. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Clean or replace the indoor air filters
2
Check the indoor coil for ice formation and allow to thaw with fan-only operation if frozen
3
Inspect the indoor fan motor for proper operation and clean the fan barrel
4
Check indoor coil for dirt buildup and clean with an approved no-rinse evaporator cleaner
5
If issue persists after cleaning, a licensed HVAC technician should check refrigerant charge
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
Air filters
Evaporator coil cleaner
Indoor fan motor (if failing)
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