Too so much mud or soot? We blank burners, adjust air-gasoline mixture

https://reidfujl223.raidersfanteamshop.com/replacement-furnaces-where-to-buy-and-what-to-look-for-4

Too so much airborne dirt and dust or soot? We refreshing burners, adjust air-gas mixture, and substitute filters to improve air great and reduce furnace residue buildup.