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Atwood GH6-8E no propane lighting.

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No pilot. Your water heater has DSI (Direct Spark Ignition). The way it is supposed to work is that when the thermostat says the water needs heated the control sends power to the spark rod and opens the gas valve at the same time. If you are standing next to the water heater you should hear the spark (snap, snap, snap) and the gas valve should make a soft clunk sound. If you hear those sounds then they are operating properly and there is a blockage either in the orifice or even the screen in the inlet of the valve is plugged (unlikely). There is also the possibility of the control board failure. That could manifest itself in a few ways, but the end result is the same. Some of the time you can look at the board and see a burned spot on it. IF by chance you need a board, the one that seems to be the best on the market is a Dinosaur Board (Dinosaur Electronics Home. High quality circuit boards for RV appliances.). The boards are very easy to replace, just pretty much plug and play.
I checked out the boards but I don't see any mention of Atwood and there doesn't seem to be any prices listed.
 
Solenoid clicks, not board! I would clean the orifice, likely dirt plugging it. Who knows maybe a piece of white Teflon tape ?.
Is the orifice part of the igniter tube? A piece of what Teflon blocking a the orifice?
 
Is the orifice part of the igniter tube? A piece of what Teflon blocking a the orifice?
forget that I made the comment about teflon tape. the ofifice is screwed into the valve end that connects to the burner tube/venturi. you will need to take the burner tube out of the heater to get to the orifice. screw the orifice out of the valve and see if you can see light in the little hole in the orifice. DON"T use a wire to clean the hole out. if anything use air pressure to back flush to clean the orifice. they make cleaner wires for the job but I would first try cleaning it with air.
 
Ok I’m going to take a second look at the board more closely looking for any signs of damage I’ll post a pic if I can. I’ve heard if you take the board off you can take it to any Atwood dealer and they will test it for free.
 
Well I cleaned everything as recommended and nothing, but I realized that I had not adjusted the tube so it was closer to be closed and lo and behold, it's working! So I would like to believe there is no issue with the board, I'll keep you all posted.
 
Sounds like a spider web or something similar in the burner. Good job on repairing it!!
 

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