their website tasks to take care of all the vital components of the system and ensure that they are all working properly.During a tune-up, an HVAC technician will clean the components and replace any worn-out parts that could cause problems in the future. This keeps your system running efficiently and effectively for years to come.3. Checking and Tightening Electrical Components: Loose electrical connections can lead to system malfunctions or click here now even pose a danger. An AC tune-up includes checking and tightening these connections to ensure safe operation.