Mitsubishi Electric
Outdoor Unit Condensate / Defrost Water Drainage Issue
Water dripping from outdoor unit or excessive water around base
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Possible Causes
Blocked outdoor drain holes or tray, Ice buildup during defrost, Improper installation of optional drain kit, Clogged drain hose (if fitted)
How to Fix / Troubleshooting
Safety first: Turn off power before working around the outdoor unit.
Steps:
- Identify normal vs abnormal: Some water dripping from the outdoor unit during cooling or defrost is normal. Excessive pooling or leakage into unwanted areas is not.
- Clear drain paths: Inspect and clear any debris from the outdoor base pan drain holes. If a drain kit is installed, ensure the hose is not blocked or kinked.
- Check unit level: Ensure the outdoor unit is level or slightly sloped toward the drain outlet.
- Cold climate considerations: In freezing conditions, ensure defrost water can drain away without refreezing around the unit.
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Repair Difficulty
Very Easy
1/5
Required Part
Outdoor Drain Tray / Drain Kit
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