American Standard
Primary Drain Pan Overflow
Water dripping from secondary drain pan or ceiling under American Standard air handler
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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
Severely clogged primary drain, Misaligned air handler causing poor drainage, Rusted or cracked primary drain pan, Blocked secondary drain outlet
How to Fix / Troubleshooting
Safety first: Turn off power to the indoor unit immediately to prevent water damage to electrical components.
- Inspect primary drain: Check the primary drain outlet at the air handler for blockage. Clear with a wet/dry vacuum or drain cleaning tool.
- Check unit level: Ensure the air handler is slightly sloped toward the primary drain outlet. Adjust supports if necessary.
- Clear secondary drain: If a secondary drain line is present, ensure it is not clogged so it can act as a backup.
- Call a technician for pan replacement: If the primary pan is rusted through or cracked, the coil/pan assembly may need to be replaced by a professional.
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Repair Difficulty
Medium
3/5
Required Part
Evaporator Drain Pan
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