Thermia
Water Leak from Condensing Furnace
Water is leaking from the base of the furnace or nearby piping.
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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 trap, Cracked condensate drain pan, Loose condensate tubing, Leaking secondary heat exchanger on Thermia condensing furnace
How to Fix / Troubleshooting
Safety first: Turn off power. Avoid standing water near electrical components.
- 1. Identify water source: Determine if the leak is from the furnace condensate system, nearby humidifier, or plumbing.
- 2. Inspect condensate trap and lines: On Thermia condensing models, remove and flush the condensate trap and drain tubing. Ensure tight connections and proper slope.
- 3. Check condensate pan: Look for cracks or overflows in the internal condensate collection pan. Replace if damaged.
- 4. Humidifier check: If a bypass or powered humidifier is attached, inspect its water connections and drain line for leaks.
- 5. Persistent leaks: If water appears to come from inside the heat exchanger area, contact a technician to inspect the secondary heat exchanger.
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Repair Difficulty
Medium
3/5
Required Part
Condensate Trap Assembly
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