I bought a house a few months ago and when I bought it I noticed what appeared to be a water spot on the ceiling of the top floor. Of course I didn't do anything about it until heavy rains over the weekend made it worse. I climbed into the attic to see what is going on and found water around the attic furnace directly above the water spot:
From what I can tell, there is a drip tray around the furnace for collecting water, and that PVC pipe is supposed to drain it. I can see if the try or the pipe has a leak, but I'm more concerned about how the water is getting into the tray and whether it's normal for that much water to accumulate. Is anyone familiar with this setup?