I have a Trane XL80 Furnace. The blower doesn't seem to put out much force. I'm wondering if there is a way I can speed it up? In the winter it seems to do fine but in the summer it doesn't seem to keep up. I've replaced centeral air compressors since and have been told they are the right size but still same problem. I really want to speed it up and force more air through the vents. The vents have been cleaned, and I always keep a new filter in the unit. Any ideas?