We are here to tell you; maintenance will prolong the life of your system and will save you money. We perform maintenance checks year-round, but the best times are right before winter and right before summer hits. Contact Information: Website: https://www.tek1mechanical.com Google +: https://www.google.com/maps?cid=17978938964904924841 Phone: (602) 800-7850 Address: 12237 N 46th Ln, Glendale, AZ 85304