Water heater sputters
I have an Atwood water heater. It was running rich and putting black soot on the side of my RV. I cleaned the heater up by blowing out the system. A lot of stuff came out. So I lit it up and adjusted the flame to where it was burning blue. But after awhile it starts sputtering and burning yellow. Then it will clear up for awhile. And after awhile it will sputter again. What do I need to look at next?
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