How to Fix / Troubleshooting

Safety: Turn off power before working near electrical components. Water and electricity are a hazard.

Steps:

Locate the condensate trap and drain tubing on the side or bottom of the furnace.
Disconnect the tubing and flush it with warm water to clear slime or debris. Use a small brush if needed.
Remove and clean the condensate trap if accessible. Reinstall ensuring all gaskets and seals are in place.
Verify the drain line slopes continuously downward to the floor drain or pump.
If the condensate collector box is cracked and leaking, replace it with a Tappan-compatible part.

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

Possible Causes