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24 specialists listed · 10 in St. Charles · 2 open weekends · 21 rated 4.5+
Data verified October 19, 2026
Listed for drivers in and around St. Charles, MO, these 24 shops list air conditioning work. What each one says about leak testing, recharging and which refrigerant it handles comes from its own website; ratings and quotes come from public reviews.
Of the 24 specialists we list here, 10 are in St. Charles itself and 14 come from towns including St. Louis (3, 18 mi), Florissant (2, 10 mi) and Ellisville (2, 15 mi). The specialists on this page are rated from 3.8 to 5.0 across 4,629 reviews; 20 have 50 or more reviews and 21 are rated 4.5 or higher. When customers rate these specialists on specific qualities, they most often praise professionalism (86%), quality (75%) and value (72%). The topics that come up most in reviews of the specialists on this page are "honest", "diagnosis" and "fair". 2 are open on Saturdays. The services the specialists on this page list most often on their websites are air conditioning services (2), automatic transmission fluid service (2), brake repair (2), engine repair (2) and oil changes (2). 5 list staff certifications (ASE) and 13 have a BBB rating of A or A+. 21 have ten or more years of experience, the longest 92 years. 7 offer financing; 2 give free estimates; 9 are family- or locally-owned and 12 list coupons or special offers. We count these figures across the specialists on this page; distances are straight-line, and hours and prices change, so confirm the details with the specialist before you visit.
8 of the 24 shops on this page take bookings online. Book the diagnosis rather than the recharge. If you buy a recharge off a menu and the system has a leak, you have paid for refrigerant that will be gone before the season ends.
