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37 Years
experience
Emergency
services
Your Trusted HVAC Partner in Bay St. Louis, MS
Mayo's Air Conditioning & Heating has served the Mississippi Gulf Coast since 1989, delivering expert HVAC installation, repair, and maintenance services. Our certified technicians specialize in Trane and Goodman systems while servicing all major brands including Lennox, Carrier, and American Standard. We prioritize energy efficiency through solutions like SEER-rated upgrades and annual maintenance agreements that extend equipment lifespan. Our partnership with Fresh-Air UV enhances indoor air quality by integrating purifiers directly into central air systems. With locations in Bay St. Louis, Gulfport, and Waveland, we combine local expertise with manufacturer-backed warranties.

Our team provides 24/7 emergency repair services and offers special financing options for new system installations. We maintain membership in Mississippi Power's Heating & Air Program, ensuring proper equipment sizing and duct design. Our semi-annual maintenance contracts include comprehensive inspections of coils, filters, and electrical components. We emphasize customer education through troubleshooting guides and smart thermostat integration. Backed by 30+ years of regional experience, we guarantee professional installations and transparent pricing.
Services
AC Installation Heating Systems HVAC Repair Maintenance Agreements Air Purifiers
Details
  • Year established: 1989
Highlights and features
  • 30+ years serving the Mississippi Gulf Coast since 1989
  • Factory-trained technicians for Trane, Goodman, and Carrier systems
  • 24/7 emergency repair services available
  • Special financing options with approved credit applications
  • Partnership with Fresh-Air UV for advanced air purification
Associations and certifications
  • Trane
  • Mississippi Power Certified Dealer
Services
HVAC Installation
We professionally install new air conditioning, heat pump, and HVAC systems for residential and commercial properties. Our certified technicians ensure proper sizing and duct design while offering Trane and Goodman systems with manufacturer warranties. The installation process includes system selection, cost evaluation, and efficient implementation tailored to Mississippi Gulf Coast climate requirements.
AC Repair
Our trained technicians provide prompt AC repair services for all major brands including Lennox, Carrier, and American Standard. Available for emergency service calls across the Mississippi Gulf Coast, we diagnose issues like refrigerant leaks, electrical failures, and coil problems. Repairs include component replacement, system testing, and efficiency optimization to restore cooling functionality.
Maintenance Agreements
Annual maintenance plans include two seasonal inspections covering coils, filters, electrical connections, and refrigerant levels. Our technicians perform cleaning, lubrication, and safety checks to extend equipment lifespan while reducing energy costs. Contract holders receive priority service scheduling and a 15% discount on replacement parts during covered repairs.
Air Purification
We distribute Fresh-Air UV light systems and activated carbon purifiers that integrate directly into central HVAC units. These solutions eliminate airborne microbes, allergens, and odors through continuous air cycling. Installation improves indoor air quality while protecting HVAC components from contamination buildup that reduces system efficiency.
Smart Thermostats
We install and configure Honeywell Lyric T6 Pro Wi-Fi thermostats compatible with new and existing HVAC systems. These smart devices allow remote temperature control via mobile apps, optimizing energy usage through programmable schedules. Technicians provide setup assistance and usage training to maximize comfort and efficiency.
Questions
What HVAC services do you offer?
We provide AC installation, heating system upgrades, emergency repairs, maintenance agreements, and air purification solutions for residential and commercial properties.
Do you service all HVAC brands?
Yes, we service Trane, Goodman, Lennox, Carrier, American Standard, and other previously installed systems across the Mississippi Gulf Coast.
Are financing options available?
Yes, we offer special financing through Wells Fargo for new system installations with approved credit applications.
What areas do you serve?
We serve Bay St. Louis, Gulfport, Waveland, Pass Christian, Diamondhead, Long Beach, and Kiln on the Mississippi Gulf Coast.
Do you offer maintenance plans?
Yes, our annual maintenance agreements include two seasonal inspections with benefits like 15% parts discounts and priority service scheduling.
Is emergency service available?
Yes, we provide 24/7 emergency AC repair services for urgent cooling system failures.