US Stove Condensation or Water Ingress

Furnace leaks water or condensation around the base or vent connection.

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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

Improper vent slope causing condensate to run back, Leaking vent joints, Moisture entering from chimney cap, High moisture in fuel causing condensation

How to Fix / Troubleshooting

Safety first: Turn off the furnace and allow it to cool before working on the vent system.

Steps:

  • 1. Inspect vent slope: Ensure horizontal vent runs slope slightly upward away from the furnace toward the termination, as specified by US Stove.
  • 2. Seal vent joints: Check for water stains around vent joints. Reseal with high-temperature silicone or replace gaskets as needed.
  • 3. Check termination cap: Make sure the vent cap is intact and properly installed to prevent rain entry.
  • 4. Fuel moisture: Use dry, properly stored fuel to reduce water vapor production.
  • 5. If leakage persists: Have a professional evaluate the venting design and installation.
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Repair Difficulty

Medium 3/5

Required Part

Venting System Components
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