I asked on Meta if this was on-topic and was given the go-ahead to post, so...
I purchased a CharBroil 2-burner propane grill a few weeks ago. The flame is the right color and certainly hot enough, but the grill acts as if there are random momentary interruptions to the gas flow. It makes soft puffing sounds and occasionally the flame will go out for a fraction of a second. I captured a short video of the problem. Watch it with the sound turned up and pay attention between 7 and 10 seconds in to see the flame puff completely out momentarily.
I called CharBroil support and their response was to send me a new Hose Valve Regulator. The new HVR did nothing to fix the problem. Another call to CharBroil and they told me it was the Blue Rhino propane tank I was using. Something about a proprietary refill valve that prevents 3rd parties from refilling the tank and also doesn't work well with CharBroil HVRs.
I obtained and tried 2 other tanks from different suppliers (AmeriGas and Bernzomatic) with the same results. CharBroil's response to a 3rd support call was to send me a new burner, which I won't receive for a week or more.
Nobody at CharBroil support seems to be interested in seeing the video or actually troubleshooting the problem. I spoke to both a first-line tech and a supervisor and both explicitly refused to view the video. I seriously doubt the new burner will fix the problem.
Has anybody seen this behavior? Is it dangerous to use the grill in this state? Can anybody identify the cause?
EDIT: The new burner did not resolve the problem. If anything, it's worse. I am returning the grill tomorrow.