Tempstar Condensate Leak

Water leaking around the base of a high-efficiency Tempstar furnace.

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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, Disconnected or cracked condensate drain line, Blocked drain termination, Cracked Tempstar condensate collector box

How to Fix / Troubleshooting

Safety: Turn off power before working around water and electrical components.

  • Step 1 – Locate leak source: Remove furnace panels and observe where water is originating (trap, hoses, collector box).
  • Step 2 – Clean trap: Remove the condensate trap and flush it with warm water to clear debris. Reinstall securely.
  • Step 3 – Inspect drain lines: Check vinyl or PVC drain tubing for kinks, sags, or cracks. Ensure proper slope to the drain. Replace damaged sections.
  • Step 4 – Clear termination: Make sure the drain terminates into an open drain and is not submerged or blocked.
  • Step 5 – Check collector box: If water appears to seep from the plastic collector box, it may be cracked and require replacement with a Tempstar OEM part.
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Repair Difficulty

Medium 3/5

Required Part

Tempstar Condensate Trap
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