Troubleshoot RV Atwood furnace 8500 IV

[maxwell18]

Trying to troubleshoot my furnace rear, it is a atwood 8500 IV it will not come on, turned up themostat nothing happens. Never have had it running purchased a while back but never run it. Tried to find the fuse for it and cannot locate it. Found the on and off switch on furnace, had power to the switch. Any ideas will help.
Thanks

[homeless]

Make sure your gas is on! And air out of the line

[Luv2go]

Here's a link to manuals at Bryant RV. Scroll down to the ones he calls Hydroflame, they're the Atwood models. They have a good description of operation and troubleshooting guide.