Yes, if you see a "rack" of burners that are not igniting your getting a delayed ignition from the raw gas this set of unlit burners is dumping out. Some times they set the pilot to just ignite one of the burners initially, then well before a delayed ignition can occur the flame jumps off the burner closest to the pilot and onto the rest. Some times to further avoid delayed ignitions a manufacturer will run like a pilot tube across all the burners.
When you're looking at it if you see something that looks like a small gas line running either above or below all the burners and having a lot of small holes in it this could be your problem, part of it may be plugged with soot or rust, just wire brush the surface and poke out all the little holes.
If you don't see anything like this then you'll need to pull the burner that isn't lighting and is closest to those that are, the very small orifice on that one is likely plugged (doesn't take much). This allows the gas to build up in the combustion chamber until there is just the right amount of gas air mixture to create the delayed ignition and sometimes get the other burners to light, or flash out all of them and causing this cycle to repeat itself.
Many people and even techs get lazy and just try to poke a small piece of wire into the orifices to clean them. This isn't the correct way to do it, all you end up doing is pushing what ever was causing the plug in the first place (plus more stuff) back into the orifice where its eventually just going to plug again. Make sure you or the tech unscrews the orifices out of the burner manifold and cleans them, don't let the tech get away with just pushing the debris back in, it will work likely long enough for his labor warranty to run out, then you'll be right back at this same problem. |