A3
Daikin · FTXS12LVJU 12,000 BTU Wall Mount Mini Split Indoor Unit with Inverter and Quiet Operation
Drain level system malfunction — the condensate float switch or drain pump has detected abnormal water levels, indicating a clogged drain line or failed drain pump
Error A3 on the Daikin FTXS12LVJU 12,000 BTU Wall Mount Mini Split Indoor Unit with Inverter and Quiet Operation means: Drain Level System Malfunction. The top-ranked community fix is “Replace the Condensate Float Switch or Drain Pump Assembly” (medium difficulty, ~45 min, DIY cost: $10-$20). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · mini split
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many mini split repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $120-$200.
External Protection Device Activated
Indoor Unit PCB Defect
Anti-Freeze Protection Activated
Indoor Fan Motor Malfunction
Swing Flap Louver Motor Malfunction
Air Filter Clogging Detected
Liquid Pipe Temperature Sensor Malfunction
Gas Pipe Temperature Sensor Malfunction
The Daikin FTXS12LVJU 12,000 BTU Wall Mount Mini Split Indoor Unit with Inverter and Quiet Operation has 8 other known error codes:
Error code A3 also appears on 2 other Daikin models:
Ad Space — banner
Replace ADSENSE_PUBLISHER_ID in AdUnit.tsx
