Trane
Condensate Drain Clog / Drain Pan Overflow
Water leaking from around the indoor Trane air handler or furnace during cooling operation.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Clogged condensate drain line, Algae or slime in drain trap, Cracked primary drain pan, Disconnected drain line
How to Fix / Troubleshooting
Safety first: Turn off power to the indoor unit to avoid electrical hazards near water.
- Locate drain line: Find the PVC drain exiting the air handler or coil cabinet. Identify the cleanout or trap.
- Clear blockage: Use a wet/dry vacuum on the outside drain termination to suck out clogs. Alternatively, open the cleanout and flush with warm water and a small amount of vinegar.
- Inspect pan: Remove the access panel and inspect the primary drain pan under the evaporator coil for cracks or rust-through. Ensure the drain fitting is tight.
- Check slope: Confirm the drain line slopes downward away from the unit with no sags.
If the pan is cracked or leaking, it may require coil removal and pan replacement by a Trane technician.
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Repair Difficulty
Medium
3/5
Required Part
Trane Condensate Drain Pan
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