We own a double wide home that was new 14 years ago. There is a big flexible heating tube in the crawl space, that is connected through the floor to the furance and it goes over to the other side of the double wide to the heat ducts. The tube has fallen out of the hole below the furnace. I was able to stick it back up into the hole but I am sure it is not in the hole well enough to keep the heat from blowing out around the sides of the tube. Anyone else ever have this problem? Help!