Oh man, I'm having a bad day! This winter I noticed the humity was very high in my house. We know we need a new furnace and had quotes to get one. I looked up on the internet about humidty being high when running a furnance and it did say it could be a faulty furnace. We ALWAYS use a carbon dectector which always reads zero. We were planning on getting the new furnace in two weeks - my husband will be off work and home while they do the install. I ran my air last week (it got hot) and noticed a musty smell. I checked out at the furnace and noticed water in the pipe which comes out at the bottom. I didn't run the furnace or the air anymore until I could have my hubby look at it, take it apart, etc. or just wait for the new furnace guy. Well today I was running the sweeper and noticed cob webs in one of the vents. I started sweeping it out and started sucking up WATER:cry:!! I have called several people - I finally have someone from the co. that installed our original furnace coming out in the next 3 hours!! Please let me know if you have ever had this problem or if you know someone who has. If so, what did they do? My BIL thinks it may be a pipe broken under the slab. I don't have a big water bill though. Please say your prayers for me if you would that it doesn't cost us a ton of money!