Furnace water drain problem in my basement
My furnace has a water drain pipe leads towards the floor drain. The furnace is in the middle of the basement. Just recently I found the floor area surround the floor drain was wet with water. I remember house inspector (4 years ago) told us to use pump to remove the water from furnace. Since we never had water problem and we did not pay attention to it. Last week was pretty hot so we turned on AC for few days and then we see water coming on the floor. After I wipe out the water and used the heat fan to blow the wet, I discovered there was a 'sweat' spot near the floor drain that keep producing 'sweat-like' wet. See two pictures below:
1. Furnace and pipe:
2. Floor drain and 'sweat' spot:
Any suggestion what is the problem? Should I call plumber or this is a simple problem that I can fix myself?