Mine did the same thing. Repair tech finally figured out that it wouldn't light correctly if the access door was shut. they tested it with door open. Some how they bent the intake around so that it could receive proper air when access door was closed. Works great now!
Were you by chance camping at a high elevation. When we got our heritage glen. The first trip we went on was to the mountains. Our camp was at an elevation around 9000 Ft. That night I noticed the hot water was'nt staying hot very long and also noticed the flame was bright orange instead of blue. After reading through pages and pages of the owners manual I finally found a section regarding our problem. The water heater was designed to EFFICIENTLY work at 3000 ft. above sea level. For ever 1000 ft above that the supply tube needed to be adjusted to accommodate the decreased amount of oxygen. It did not describe how to adjust it and when I called my dealer then next day, they said the best thing to do is just to buy another tube calibrated for high altitude. I never did as we very rarely run off of propane anyway. But its a thought.
A spider made its web in the burner orifice
I've seen this numerous times over 30 years in the propane industry
You'll need to remove the orifice and physically remove web
blowing air through the manifold tube won't work,1/2" box wrench is all you'll need
As for the soot, use vinegar and water,it won't completely remove it but a Majority.
Soot is the devils paint!!!
Good luck
Tony
Try using a good wax . I use Duragloss 101 . Had the same problem this week . Got home and used high pressure air hose and blowed out the orifice . Got lucky and it cleaned it up. Blue flame.
Our last new rv had the lazy yellow flame/soot issue the first time we used it. The flame should be bright blue and forceful. I had to clean the orifice to get it working properly (after I removed the wasp nest that was under the heat shield).
Linear Mode
