Furnace Fan Rattling

[tmarquis]

Hello,

I have an 23' 09 international. When we turn on the furnace we have developed a noise coming from underneath the front left couch. I've done some investigating and it looks like the flexible air ducts run into a metal box with a fan in it. The fan is hitting the sides of the box. I only know this from reaching around behind the floor cabinets. I need access to it. Does anyone know the best way to get to it? Under the cushions is where I started but I dont see any logical way to remove the plywood. Thoughts?

Thanks,
Tom

[overlander63]

The HydraFlame furnace is removed from outside the trailer.