Performed annual ac maintenance in Colfax, on 1 yr old American standard split system. Everything equipment wise is working great. Keep eye on slope of pad ac sits on, might need to shimm it up. Gave unit a bath. Checked electrical connections. Filters very dirty, 1 tore. 16-20-1 filters x 2. Would recommend washable filters so every time we come out we can clean them for you. Emailed quote for filters.