Emergency HVAC O'Fallon

Best 24/7 HVAC Repair in O'Fallon

Receive up to 3 Emergency AC Repair quotes for your project today! Compare profiles, reviews, accreditations, portfolio, etc... and choose the best deal.

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  • Tri State Mechanical Services Inc
    4.4
    2338 N Lindbergh Blvd, St. Louis, MO 63132, 63132, US

    Tri-State Mechanical Services is a family-owned and operated mechanical contracting service serving the St. Louis and Metro areas, including Central Missouri and Southern Illinois since 1989. We pride ourselves on providing the highest quality workmanship every day as we build long-term relationships with our clients. We are a full-service mechanical contractor specializing in HVAC & Food Service Equipment. Our services include installation, sales, repair, and service for air conditioning and heating, commercial refrigeration, and kitchen equipment. We have a professional team of technicians who provide honest and dependable service 24/7. We service all brands, including York, Lennox, Carrier, Rheem, Ruud, and Trane. We also have a 24-hour emergency service available with an extensive parts stock for all commercial and residential equipment, old and new. If we don't have it, we'll source it fast. We are your one-stop shop for all your mechanical contracting needs in St. Louis.

  • Kirkwood Heating & Air Conditioning
    4.7
    St. Louis, MO, 9350 Watson Industrial Park, 63126, US

    Kirkwood Heating and Cooling is a trusted HVAC company in St. Louis, MO, providing top-notch heating, cooling, and heat pump services. Our experienced team has been working in the industry for a long time, with the necessary skills, training, and certifications to resolve your heating, cooling, and indoor air quality problems. We offer a range of services, including repair, maintenance, installation, and replacement, with a focus on individual projects and attention to detail. Our fair pricing system caters to the customer's needs, and we ensure that the entire process occurs within your budget. We are available 24/7 for emergency services and offer a range of products from Carrier, including air conditioners, heat pumps, gas furnaces, programmable thermostats, humidifiers, ductless split systems, boilers, air cleaners, and zoning products.

  • Emerson
    3.8
    St. Louis, US

    Emerson is a global technology, software and engineering powerhouse driving innovation that makes the world healthier, safer, smarter and more sustainable.

  • Thomas Hoffmann Air Conditioning & Heating LLC
    4.9
    St. Louis, Missouri, 1623 Wendover Lane, 63131, US

    Thomas Hoffmann Air Conditioning & Heating LLC is a trusted provider of HVAC services in St. Louis, Missouri. With years of experience, our team of experts is dedicated to providing top-notch service, repair, and installation of air conditioning and heating systems. Our mission is to help our customers breathe easier today by providing exceptional indoor air quality assessments and solutions. We pride ourselves on our commitment to customer satisfaction, honesty, and integrity. Our team is led by Thomas Hoffmann, a seasoned professional with a passion for delivering exceptional service. We are fully accredited and insured, and our team is fully trained to handle all types of HVAC systems. Whether you need emergency service, routine maintenance, or a new installation, we are here to help. Contact us today to schedule your appointment and experience the difference for yourself.

  • Miller Certified Air
    Suite 105, 3460 Hampton Ave., St. Louis, 63139, US

    Over 35 years of providing expert testing and balancing services yielding accurate, reliable results. Testing and Balancing MILLER CERTIFIED AIR, INC. Testing And Balancing 3460 Hampton Ave. Suite 105 St. Louis, MO 63139 Office: (314) 352-8981 Email: [email protected] Copyright 2013. Miller Certified Air, Inc. Testing and Balancing All rights reserved.

  • Hussmann Corporation
    3.6
    St. Louis, US

    Hussmann is a leader in providing display merchandisers, refrigeration systems, installation and services to food retailers around the world. Inspired ideas that anticipate shoppers' desires. At Hussmann, our innovative thinking and integrated solutions are transforming the business of food retail and turning the shopping experience into a pleasure.

  • One Hour Heating & Air Conditioning® of St. Louis
    5
    3636 S Geyer Rd Ste 100, St. Louis, 63129, US

    One Hour Heating & Air Conditioning is a premier HVAC service provider in the United States. We care about your comfort and respect your time, which is why we back all of our work with a 100% customer satisfaction guarantee for two years. Our team of experts is always on time, guaranteed, and we offer StraightForward Pricing with no hidden fees. We provide a range of services including emergency HVAC services, air conditioning, heating, furnace repair and installation, ductwork, and more. Our goal is to make your home feel like home, and we're here for you when you need us most.

  • NOOTER St. Louis
    4.6
    1500 South 2nd St., St. Louis, 63104, US

    NOOTER is a fully integrated turnkey construction, multi-craft, construction engineering and maintenance contractor, in the industrial and commercial sectors. With vast experience, a highly-skilled multi-craft labor force and unlimited geographical reach, we respond in real-time to vital projects or emergency situations, when and wherever needed. Our goals are your goals: to achieve and maintain outperforming production environments for the life of your facility.

  • JLM Heating and Air Conditioning
    5
    St. Louis, US

    Welcome to JLM Heating & Air Conditioning, we provide top-notch HVAC services to ensure your home or business remains comfortable year-round. Our experienced technicians are dedicated to delivering quality service and exceptional customer care. We proudly serve St. Louis, MO, and the surrounding areas. Contact us for a free estimate today! We offer a comprehensive range of HVAC services to meet your needs: heating, air conditioning, indoor air quality, boilers, refrigeration, geothermal, heat pumps, AAON/Wattmaster, and water heaters. Our experienced technicians are dedicated to delivering quality service and exceptional customer care.

  • Galmiche & Sons Heating & Cooling
    4.2
    2280 Chaffee Drive, St. Louis, 63146, US

    Galmiche & Sons, Inc. is a family-owned heating and cooling service provider in St. Louis, MO. What began as a gutter installation company 58 years ago is now one of the most trusted names for providing heating and cooling solutions to homes and commercial establishments in the greater St. Louis area. As HVAC contractors, we specialize in everything from repair to new installation and are a one-stop service provider for all your heating and cooling needs. We are in the business of making interior spaces more comfortable for you. Galmiche & Sons, Inc. is a leading heating, air conditioning, and ventilation specialist. Replacing old equipment, revamping ductwork, and designing full HVAC systems are few of our basic services. We hire only EFA certified and trained technicians who ensure excellent workmanship and timely work. We are committed to providing each customer only the best quality in products, services, and customer care. We can customize our services per your requirements and, no matter what you needs, we can offer a solution.

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Frequently Asked Questions About Emergency HVAC Services

Find answers to common questions about emergency HVAC repair and 24/7 heating and cooling services.

How do I reset my HVAC system?

Sometimes, a simple reset can resolve minor HVAC issues. Follow these steps to reset your system:
  1. Turn off the system: Switch off your HVAC system at the thermostat.
  2. Turn off the power: Locate the circuit breaker for your HVAC system and turn it off.
  3. Wait: Wait a few minutes for the system to completely power down.
  4. Restore power: Turn the circuit breaker back on.
  5. Turn on the system: Switch your HVAC system on at the thermostat.
If the problem persists after resetting, it's best to contact a qualified HVAC technician for diagnosis and repair.

What is a dehumidifier, and do I need one?

A dehumidifier removes excess moisture from the air, reducing humidity and preventing mold. High humidity can make your home feel hotter and stickier. A dehumidifier can help to create a healthier and more comfortable indoor environment. You can use a portable dehumidifier for specific rooms or have a whole-house dehumidifier integrated with your HVAC system.

How do I know if I have a gas leak?

Gas leaks are extremely hazardous. Signs of a gas leak can include:
  • A sulfurous odor
  • Hissing or whistling sounds near gas lines or appliances
  • Blowing dirt or bubbles in standing water
  • Dead or discolored vegetation near gas lines
  • Physical symptoms like dizziness, nausea, or headaches
If you suspect a gas leak, immediately evacuate the area and call your gas company or 911 from outside the building. Do not operate any electrical switches or appliances, as this could ignite the gas.

What is a zoning system, and do I need one?

A zoning system creates separate heating and cooling zones that can be individually controlled. This provides more precise temperature control and can save you energy by only conditioning the occupied areas of your home. Zoning systems are a good option for homes with multiple levels or for rooms that are difficult to heat or cool.

How do I reset my HVAC system?

Sometimes, a simple reset can resolve minor HVAC issues. Follow these steps to reset your system:
  1. Turn off the system: Switch off your HVAC system at the thermostat.
  2. Turn off the power: Locate the circuit breaker for your HVAC system and turn it off.
  3. Wait: Wait at least 5 minutes for the system to completely power down.
  4. Restore power: Turn the circuit breaker back on.
  5. Turn on the system: Switch your HVAC system on at the thermostat.
If the problem persists after resetting, it's best to contact a qualified HVAC technician for diagnosis and repair.

What is a dehumidifier, and do I need one?

A dehumidifier removes excess moisture from the air, reducing humidity and preventing mold. High humidity can make your home feel hotter and stickier. A dehumidifier can help to maintain comfortable humidity levels. You can use a portable dehumidifier for specific rooms or have a whole-house dehumidifier integrated with your HVAC system.

How do I know if I have a gas leak?

Gas leaks are dangerous and hazardous. Signs of a gas leak can include:
  • A rotten egg smell odor
  • Hissing or whistling sounds near gas lines or appliances
  • Blowing dirt or bubbles in standing water
  • Dead or discolored vegetation near gas lines
  • Physical symptoms like dizziness, nausea, or headaches
If you suspect a gas leak, immediately evacuate the area and call your gas company or 911 from a safe location. Do not operate any electrical switches or appliances, as this could ignite the gas.

What is a zoning system, and do I need one?

A zoning system divides your home into separate zones that can be individually controlled. Each zone has its own thermostat, allowing you to customize temperatures in different rooms. Zoning systems are a good option for large homes or for areas with inconsistent temperatures.