Mitsubishi Electric Drainage System Leak or Blockage

Water leaking from the bottom of the dehumidifier onto the floor.

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Possible Causes

Cracked water tank, misaligned tank, blocked internal drain channel, loose continuous drain hose connection, overflowing humidifier tray

How to Fix / Troubleshooting

Safety: Unplug the unit. Water near electrical parts can be hazardous.

Steps:

  • Inspect tank: Remove the water tank and check for cracks or damaged seals. Replace the water tank if cracked.
  • Check seating: Ensure the tank is fully inserted and level. Misalignment can cause internal spills.
  • Clean drain channel: With the tank removed, locate the drain outlet from the evaporator tray. Use a flexible brush or pipe cleaner to clear slime and debris.
  • Continuous drain: If using a hose, confirm it is firmly attached to the drain port and slopes downward with no kinks. Tighten any hose clamps.
  • Humidifier section: On hybrid units, inspect the humidifier tray for overflow and clean its drain path.
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Repair Difficulty

Easy 2/5

Required Part

Water Tank / Drain Hose
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