Hi new here- bought this smoker beginning of March from Sears and it had been working fine until last week. Smoked a couple of pork shoulders and briskets that came out very well thanks to this forum! Started getting a huge yellow flame - tried resetting the regulator, cleaning the venturi tubes, burner, etc. but no luck. Called Masterbuilt and as it's still under warranty they sent a new regulator and hose assembly. Put it on and checked for leaks using soapy water and it seemed OK - fired it up and again HUGE yellow flame when set to high - almost goes out when turned to low. Will call Masterbuilt again when they are open on Monday but wanted to know if anyone had any ideas in the meantime? Bad burner, tank of gas? I'll have to run and get a couple tanks exchanged to check that but it's the only other think I can think of unless the replacement regulator is bad too? It is made in China and does seem rather flimsy but they can't all be bad?