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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