What is the consequence of dirty and clogged evaporator coils?

When evaporator coils become dirty and clogged, they are significantly hindered in their ability to efficiently transfer heat. This leads to icing on the evaporator coil because the airflow is obstructed, causing the moisture in the air to freeze instead of being effectively removed. The accumulation of ice further blocks airflow, exacerbating the problem and creating a cycle of reduced efficiency and increased icing.

In conjunction with icing, dirty coils also contribute to other issues, such as increased energy consumption due to the system having to work harder to maintain desired temperature levels. Likewise, a strain on the compressor may result because it compensates for the loss of cooling performance. While these are important effects, they stem from the primary issue of icing resulting from the experienced reduced airflow directly tied to dirty and clogged coils. The icing directly represents a visible and immediate consequence, illustrating the importance of proper maintenance of the coils for overall system efficiency.