Preventive maintenance of split units: cleaning, measurements and what builds loyalty

Almost every split that "stopped cooling" did not break: it slowly got sick. Clogged filter, dirty coil, drain pan full of sludge, blocked drain, outdoor unit full of dust. Each of these costs efficiency, energy and, in the end, the unit itself.

This course starts with what each part does and what dirt does to it. Then it shows the maintenance traffic light: what the owner can do alone, what is a technician's service and what is only for the refrigeration technician. Next you follow a complete cleaning of a 12,000 BTU/h split in a commercial room, step by step, plus the cleaning of the outdoor unit and the drain. In the final module you learn the five measurements that tell you whether the unit is healthy, put together a report with photos and turn the visit into a routine and a contract.

The course does not teach compressor or board repair or refrigerant handling (that is CL6). It does not give professional qualification.