Aprilaire
Humidifier Drainage Failure / Overflow
Water leaking from Aprilaire humidifier onto furnace or floor
Advertisements
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.
Advertisements
Possible Causes
Clogged drain line, Improperly sloped drain hose, Cracked or misaligned drain pan, Excessive water pressure through orifice, Drain line frozen in unconditioned space
How to Fix / Troubleshooting
Safety first: Turn off furnace power and shut off water to the humidifier. Protect electrical components from water.
- Inspect drain line: Follow the drain hose from the humidifier to the floor drain or condensate pump. Look for kinks, sags, or algae buildup. Remove and flush the hose with hot water or a mild bleach solution.
- Check slope: Ensure the drain line slopes continuously downward with no traps unless specifically designed.
- Clean drain pan: Remove the water panel and inspect the drain pan at the bottom of the humidifier. Clean out mineral deposits and debris that can block the outlet.
- Verify orifice size: Confirm the correct Aprilaire orifice is installed for your water pressure. High pressure may require a different orifice; consult the manual.
- Repair or replace pan: If the drain pan is cracked or warped, replace the Aprilaire humidifier drain pan to prevent leaks.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Aprilaire Humidifier Drain Pan
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements