Most coil maintenance advice amounts to “clean it regularly.” That is correct and nearly useless, because itdoes not say how often, by what method, or how to tell whether it worked. This guide is written for the person who actually has to do it. How Often Inspection interval should be

Condenser and evaporator coils are often described as doing opposite jobs in the refrigeration cycle — onerejects heat, the other absorbs it. That is accurate, and it is also where most explanations stop. For anyone specifying or buying a coil, the useful question is different: given that they do opposite