I have a Bradford White gas water heater. By coincidence, we noticed that the burner flame pops all of a sudden and a big flame starts up in the unit (see video for location).
I sat for an hour in the garage to observe. The burner came on as we used hot water, everything was normal. After 5 - 10 minutes, there was a big pop sound as if a burst gas was supplied and a big flame came on as can be seen in the video. I then moved the temperature knob to low and the flame died down.
See attached video. Any idea why this would happen? Recommendation?
Video updated on March 15th at approximately 3:30 pm ET. https://www.dropbox.com/s/cfi95sw371rls14/Video%20Mar%2015%2C%2010%2054%2014%20AM.mov?dl=0