Upon arrival system was in working condition. Looking at the indoor unit all electrical connections and components are good. Blower is a little dirty. Coil is clean. Both plenums are dirty and have biological growth. Recommended duct clean and uv light. Flame sensor has visible rust , working at this time however. No water safety. Heating componets and safetys are good. Filter was changed. Left system in working condition. Thank you for choosing comfort experts.