Came to residence for prepaid MSC tune-ups on two '16 ac systems. Equipment functional upon arrival. Upon inspection of the left outdoor unit, I found all components to be operating properly at this time. I cleaned off the condenser and the disconnect and checked all electrical parts. Upon inspection of the right outdoor unit, I found all components to be functional according to manufacturer specifications. On further inspection of the inside unit for the main house, I found the 24x25x4 filter was dirty and replaced it with homeowner approval. I also found the blower wheel is starting to get dirty and recommend having it cleaned in the fall. All other components are good to go. On further inspection of the basement apartment unit, I found the 16x25x4 filter was dirty and replaced it with homeowner approval. All other parts look good and are functioning well. See health report cards for any specific information. Equipment functional upon departure. Thanks for your business and ha