Economizer fires are generally caused by poor maintenance and what other factor?

Economizer fires are typically linked to the accumulation of combustion deposits, which occur when there is inadequate maintenance or cleaning of the economizer system. Over time, these deposits can insulate the heat exchange surfaces, making it difficult for the system to function effectively. As the efficiency decreases, the surfaces can overheat, leading to fires within the economizer. Regular maintenance checks and cleaning routines are crucial in mitigating this risk by ensuring that any buildup of soot, ash, or other combustion residues is managed appropriately. This emphasizes the importance of diligence in maintenance protocols to prevent such dangerous conditions from arising.