Question about Heating & Cooling
Your not getting enough air mixing with the gas and that's what causes the black soot. Typically this occurs when you're using a natural gas system on propane or butane. If this is the case you need to convert it to the proper propane orifices (jets) and open the air intake. If the unit has not been converted the problem still remains the same, you're not getting enough air mixing with the gas. You have an obstruction, which can be very small, inside the air intake or mixing tube or the orifice has been opened up to large and is allowing too much gas into the system and the maximum air opening isn't enough to compensate for the extra gas. Cobwebs are a common occurance inside a mixing tube, check for that after you've verified the orifice is the correct one for the type of gas that's being used.
Posted on Oct 04, 2010
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Posted on Jan 02, 2017
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