Am anxious to get it out but noticed there doesn't seam to be any control for the furnace. Do they all have thermostats or ?? It looks like you have to use a screwdriver to adjust the gas valve thru the grill. What am I missing??
Thanks for any help. Shooting Creek

You should have a thermostat. In my 1990 25ft. Classic it is located on the wall by the ref. If it is missing you can replace it with a thermostat bought at wallmart. Do a search for back posts on this.

Thanks Sam, I'll look at the option. The previous owner had taken the furnace apart so now I get to put it back together.

Do a search for the make of your furnice. Hopefully this will give you an exploded diagram to put your furnice back together.