Unscrew the unit’s exterior trim panel and you will see the furnace itself; there will be mounting screws that secure it to the surrounding framing or carpentry. There should also  be some visible 12V wires to disconnect and the propane line as well. Once all that is free, you yank away at the whole chassis and hope the exhaust pipe isn’t frozen to the ancient, rusty external vent!

That’s how I remember it anyway. 

I have the same issue with the same furnace. Any tips on how to access the motor/removing the furnace? 
 

thanks,

Marco

1990 Itasca Micro

13 hours ago, IdahoDoug said:

Well, don't let winter stop you - use it to motivate yourself. Since much of the work will be inside the camper, buy a cheap electric heater and go to work.  You'll have a head start as Spring arrives, and the finishing phase will be exciting as camping season will feel just around the corner as you are completing things.  By contrast, if you start in the spring you may be disheartened as it will be late summer by the time you finish.  Also, a LOT of camper items are very cheap during the winter, so you'll save money.  By spring everything will be back to full retail.  I just went through all these phases myself and it was worth it.  We live close to the Canadian border, so winter was a factor. By embracing it, we got to camp the final year of the project.

I'm hoping to get as much as I can done this winter! Thats what I was thinking too. Perfect time to work on the inside. Will be great to have a nice Toyota camper to camp in!