Burner Tube

Still haven't figured out for sure exactly what is wrong. All the sensors I replaced so far have not fixed the cut out problem. I had to move the high limit off to the side of the mounting hole in the firing tube to keep it from shutting down the burner. I still need to check my gas pressure regulators, which would cause the burner to be extra hot if the pressure is too high. I have been hearing a low pitched buzzing noise come from the high pressure regulator on my 1000 gallon tank. I will have my gas supplier check out the regulators in the system.