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Claim This BusinessNiksic Air Conditioning & Heating has kept St. Louis homes and businesses comfortable since 1991, building more than three decades of local experience as a family-owned mechanical contractor. Based at 4444 Gustine Avenue in the Dutchtown neighborhood, this full-service MEP company serves the City of St. Louis and surrounding communities within a 50-plus-mile radius. The company holds strong ratings across 22 verified reviews, with customers frequently praising their responsiveness and honest approach to diagnostics and repairs. Whether you need AC repair, electrical updates, or plumbing fixes, Niksic handles all three trades under one roof for both residential and commercial clients.
What distinguishes Niksic from many St. Louis contractors is their commitment to transparent recommendations without aggressive upselling. Multiple reviewers specifically note that technicians tell clients what actually needs to be done rather than pushing unnecessary system replacements. The company provides free estimates on all residential and commercial projects, and their 24/7 availability means emergency calls receive same-day response. Their service philosophy emphasizes leaving every job site clean, customers repeatedly mention technicians arriving in boot covers and respecting their homes. As a one-company solution for mechanical, electrical, and plumbing needs, they eliminate the coordination hassle of hiring separate specialists.
Customer reviews reveal specific technicians making lasting impressions. Amir receives multiple shout-outs as a team leader who explains his repair approach clearly and treats customers with respect. One reviewer describes a plumber who thoroughly explained his diagnostic process during a challenging clog situation, recommending alternatives rather than pushing expensive solutions. Another customer recounts how Niksic handled multiple properties across their portfolio, consistently delivering competitive pricing. The company's rapid response during urgent situations earns consistent praise, one reviewer highlights unbelievable turnaround time and flexibility when problems arise.
All eight reviewers award 5 stars, with multiple customers specifically noting the company recommends repairs over replacements and provides honest pricing. Four reviewers mention fast response times or same-day service, while Amir receives named recognition as a technician who explains repair approaches clearly.
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| ThursdayToday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
Heating and cooling system repairs, tune-ups, and diagnostics for residential and commercial properties.
New AC system installation for homes and commercial buildings throughout the St. Louis area.
Furnace repair, maintenance, and installation to keep properties warm during Missouri winters.
Full range of onsite electrical work including repairs, upgrades, and new installations.
Complete plumbing repairs, water softener installation, drain cleaning, and pipe work.
Free project estimates for both residential homes and commercial facilities.
Same-day response for urgent heating, cooling, electrical, or plumbing emergencies.