I have a Rheem system and I noticed water coming out of the secondary drain onto my roof. When I inspected the unit in the crawlspace, I noticed the main condensate pan was full and overflowing into the secondary pan underneath it. When I removed the cap on the vertical pipe where the U trap is, there was a lot of whitish/tan globs blocking the pipe. I took a piece of wire and cleared the glob and the water began to drain, though not as quickly as it should for a 1/2-3/4" pvc pipe. I suspect there's more of the soft globby stuff in the trap and perhaps along the drain pipe where it eventually goes into my bathroom sink below. The glob looks like the soft whitish stuff you find in your car's windshield washer reservoir after a long period of time if you only use water. It's not hard or crusty, but seems like jello consistency. Would pouring in some kind of drain cleaner clean out the globby stuff? (I recall seeing similar soft buildup inside my sink trap when I clean it out from time to time and I imagine a liquid drain cleaner removes that stuff as well as hair, etc.) What do you suggest using? I can't pour the stuff in and leave it overnight like most regular drain cleaners suggest so anything that works faster (and safe to use on plastic pipe and rubber hose that connects the drain to the sink drain) would be appreciated. Thank you very much in advance!

We have had a 2 stage Trane for 6 years. Last year we learned that the second stage had never been connected. The original contractor returned and fixed this problem. We have had numerous other issues with ducts leaking air, etc. Everything seemed to be fixed but as the temperature climbed a couple of weeks ago, we weren't feeling the cooling that we should have. Checked all vents and cool air is coming out but not very forcefully. I called the contractor again and his guy now says that the coil needs replacing because it is constricted - how does that happen? We have service every 6 months so there is no dirt on the coil. When I google for coil problems I see either dirt or bushes growing into the system. We have neither issue. What could cause the coil to go bad at only 6 years? If the coil is bad, why do we feel cool air coming out of the vents? I asked him and he said it feels cool because it is cooler than body temp but I know this is cooler than other air and would be hot coming out of attic ducts if there was no cooling. He said it is partially constricted. Anyone ever heard of this? Thank you.