Completed with heat 1 on 2024 Lennox signature gas horizontal in attic for upstairs, 2021 trane gas horizontal in attic main downstairs and master bathroom 2015 upflow in attic closet. All furnaces heating properly at this time of check up, 2015 flame sensor and ignitor showing wear which recommended replacing them very soon, also all the ducts are very dusty. Duct cleaning is recommended for better air quality, keep unit running smooth and efficient, also notice inducer motor making a loud noise at times. Customer approved to replace ignitor at this time.