Read everyone's replays. I work with both nat. and LP gas on commercial cooking equipment. Goes from a little range top to ovens the size of a mini van. I am guessing you have LP gas??. That LP gas is almost twice as heavy as natural gas and it actually flows like a liquid along the ground when cold. In ALL of the burner systems I have worked on never- ever- ever have tried to fix a burner. Something tells me you are talking about a plentum or heat exchanger? Buy a NEW furnace!!! Those 96% units are great. I have one on natural gas. Clean the filters and change the batteries in the Tstat. Natural gas is the same specific gravity as air and mixes well. Like I said LP is almost twice as heavy and doesn't like to redally mix with air. Something sounds so FISHY with your guys repair. I would get someone else to come in. Going back to LP. The burners have air shutters on them and for LP they need to be almost wide open as where natural gas they are a little more than 1/3 open. LP has a lot more BTU.content than nat. gas but it is also fussyer. Also for giggles take a look on the builders plate. See if the original build was for nat. Or lp gas. You could have the wrong orifice jets and that can mess up ignition too. Your description sounds like not enough air flow into the burner. There are just so many little tweaks with this equipment. Get another guy to look . This is just one of the certifications you need to work on commercial equipment and they pound it into you about messing with LP.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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