a3
Easy Fix
Daikin · Mini-Splits & Ductless Systems
Condensate Level Abnormal
Quick Answer
Error code A3 on your Daikin Mini-Splits & Ductless Systems means: Condensate Level Abnormal. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Check the condensate drain line for clogs and clear using compressed air, wet-dry vacuum, or drain cleaning solution
2
Inspect the drain pan under the indoor unit for standing water and verify it drains freely
3
Test the condensate pump if equipped by pouring water into the reservoir
4
Verify the drain line has proper pitch (1/4 inch drop per foot minimum) away from the unit
5
Clean the drain pan and float switch mechanism to ensure proper operation
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Condensate drain line cleaner
Condensate pump (if failed)
Float switch
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