Dirty external exchanger: how it increases icing and defrost cycles

An external exchanger filled with dust, leaves, or debris struggles to exchange heat with the air.

Reduced airflow

Pollutants between the fins restrict the amount of air passing through the coil.

Lower coil temperature

Reduced heat transfer can lead to a colder surface and easier ice formation.

More frequent defrosts

The system may require more defrost cycles and exhibit lower average efficiency.

Maintenance

Cleaning must be performed in a way that does not bend the fins or damage electrical components.