What might happen if the filters in a system are dirty?

When filters in an HVAC system are dirty, one of the most significant consequences is the potential for a high-temperature rise. Dirty filters obstruct airflow, which can lead to a decrease in the amount of air flowing over the heat exchanger. As the airflow is restricted, the system works harder to maintain the desired temperature. This increased strain can result in elevated temperatures, which can not only diminish the efficiency of the heating system but also potentially cause damage to components like the heat exchanger due to overheating.

This high-temperature rise can lead to auto shut-off mechanisms activating, ultimately resulting in system failure or excessive wear and tear on the equipment. Regular maintenance and replacement of filters are crucial to ensure optimal performance and safety of the HVAC system.