Hello all, I have noticed that the air temp in one of my main trunk lines is 115f and the other is 135f I have tried manipulating registers but can not get it to balance out. I'm looking for any suggestions? It is a forced hot air furnace 113k BTU basement/upflow model about 1 year old. The hotter of the 2 ducts is on the side of the plenum and the cooler is on the front of the plenum (opposite the blower) both are 8" x 16" trunk lines and have offset takeoffs, although the takeoff on the hotter duct has a larger inlet apprx. 12"x16" as opposed to apprx 10" x 16" on the cooler duct (not sure if that matters but I figured I would give as much info as possible). Again any input would be greatly appreciated.