Dust, Condensers and Lost Cooling Capacity

A condenser rejects heat through airflow across its fins. Fine reef and chrome dust bridges the fins, and once air cannot pass, no amount of refrigerant will restore cooling.

Effective cleaning means removing deposits from the full depth of the coil without bending fins or driving debris deeper. Pressure washing a coil from the wrong direction often makes the blockage worse, and this is one of the most common causes of a machine that was 'serviced' and is still hot.