furnace ducts on Berkshire
Well, I was out at the storage facility today to do my monthly (or so) genny exercise. I usually fire up the furnaces and fireplace to put a load on the generator. I was sitting on the couch (390fl) and only a small amount of heat was coming out of the ducts under the couch. They were attached well at the factory with a previous visit, so I knew that wasn't an issue. Just for the heck of it, I pulled off the furnace cover/vent on the kitchen island. Much to my surprise I found that one of the flexible heater hoses was only partially connected to one of the furnace outlets. I reattached it and voila, good strong heat from under the couch vents. If you are having problems with weak heat output, this may be another avenue to explore.