Mitsubishi Electric
Indoor Unit Water Leakage
Water dripping from the indoor unit front panel or onto the wall/floor
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Possible Causes
Clogged condensate drain line, Improper drain pipe slope, Damaged or cracked drain pan, Excessive indoor coil icing and melt-off
How to Fix / Troubleshooting
Safety first: Turn off the unit and power at the breaker to avoid electrical hazards from water.
Steps:
- Check filters and coil: Clean dirty filters and coils to reduce icing and excessive condensate.
- Clear drain line: Access the drain outlet and use a wet/dry vacuum or compressed air to clear blockages. Ensure the drain hose slopes downward continuously with no upward loops.
- Inspect drain pan: Remove the front cover and check the drain pan for cracks or misalignment. Reseat or replace if damaged.
- Check unit level: Verify the indoor unit is slightly tilted toward the drain side as per installation instructions.
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Repair Difficulty
Easy
2/5
Required Part
Condensate Drain Hose / Drain Pan
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