Does anyone know what this could be.... to start off with I'm in WI and it is SUPER humid outside today with lots of rain.....
So, we noticed that the duct above the furnace is leaking water, and it's coming out pretty good. The air is on. It is leaking on the furnace.
1) What could this be
2) Is there any danger such as carbon monoxide or fire.....
Thank you for any help which is appreciated.