So the unit is roughly a year old. GMS920804N Horizontal/Upflow. I believe this is the model but I'm not certain because I'm not at home to verify. The unit was in place when we bought the home about 5 months ago. We are only just now attempting to use the furnace for the first time since we moved it. Here's the problem: I have 3 flashing LED's. I have the manual to tell me what's wrong but it's what I hear that's troubling me. The blower comes on during start up but I can HEAR water sloshing in the fan. Here is what I've done but am willing to retry: I checked all of the drain tubes. Blew them out. Checked for plugging. Pulled what I thought was the drain tube off of the blower itself but still can't seem to get the water out. Best as I can tell the port between the drain tube and blower housing itself is not plugged. Verified by trying to rod it to no avail. I did find some condensate in the tubes between pressure switches but I've since drained them. Checked my trap and even placed water back in it to make a seal for vacuum. Full disclosure I know next to nothing about AC/heating. Shooting from the hip. Recap: Essentially, just water in the blower that isn't draining which I think is the only thing locking out my furnace but I really don't know.

I just turned our furnace on for the first time this year, and for the first time ever it's cutting in and out. The heat stays on for about half a minute to a minute. A video of how it's performing may be found here: [url]https://www.icloud.com/sharedalbum/#B1a5yeZFhGzPsMJ[/url]