Danfoss Condensate Leak / Drain Misrouting

Water leaking from the base of the furnace or around the condensate drain

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Possible Causes

Cracked condensate trap, loose drain tubing, blocked drain line, missing trap on condensate outlet

How to Fix / Troubleshooting

Safety first: Turn off power. Avoid standing water near electrical components.

Steps:

  • Locate leak source: Remove the lower panel and observe where water is originating—trap, tubing, or heat exchanger drain port.
  • Clean and clear drain: Remove the condensate trap and flush it. Use a wet/dry vacuum on the drain line to clear blockages.
  • Check tubing connections: Ensure all hoses are fully seated on their barbs and secured with clamps if necessary.
  • Replace damaged parts: If the trap or tubing is cracked, replace with compatible condensate components rated for condensing furnaces.
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Repair Difficulty

Easy 2/5

Required Part

Condensate Drain Tubing
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