I was called to a home in Tucson, Arizona, to clean a hole unit. The unit was not cooling properly, and the homeowner suspected that the unit was low on refrigerant. I arrived at the home and performed a thorough inspection of the unit. I found that the evaporator coil was covered in dirt and debris, which was preventing the unit from cooling properly. I cleaned the coil and recharged the refrigerant, and the unit started cooling again. The homeowner was very pleased with the results, and I was able to provide them with a quote for future maintenance.