I am a professional home service technician who specializes in air conditioning maintenance. I recently completed a job at a residential home in the city. The client had been experiencing issues with their air conditioner, so I arrived at their home to inspect the unit. After a thorough inspection, I discovered that the air filter was clogged, which was causing the unit to work harder than necessary. I cleaned the air filter and replaced it with a new one, which resolved the issue. The client was very pleased with the service and thanked me for my help.