AC Repair O'Fallon

Find the best AC Repair in O'Fallon

Get multiple AC Repair quotes for your project today! Compare profiles, reviews, accreditations, portfolio, etc... and choose the best deal.

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  • 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.

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  • Aire Serv of St. Louis
    5
    Not Found, St. Louis, 63101, US

    Aire Serv of St. Louis is a locally owned and operated HVAC company serving the St. Louis, MO area. We are dedicated to providing expert service, upfront pricing, and 24/7 customer service. Our team of experienced technicians is committed to delivering reliable and efficient HVAC solutions for both residential and commercial customers. We offer a wide range of services, including AC repair, heating repair, maintenance, and installation. At Aire Serv, we believe in the Neighborly Done Right Promise™, ensuring that our customers receive the highest quality service and support.

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  • Meyer Heating and Air
    4.9
    11134 Lindbergh Business Ct, St. Louis, 63123, US

    Meyer Heating and Air is a St. Louis-based HVAC company that provides expert services for residential and commercial properties. With years of experience in the industry, our team works on all makes and models of heating and cooling systems, offering installation, repair, maintenance, and general service. We help our customers in O'Fallon and surrounding areas, including Fenton, Arnold, Ballwin, St. Charles, Chesterfield, Sappington, and St. Louis, to ensure their HVAC systems run smoothly and efficiently. Our 24/7 emergency service means we're always available to help, and our team is dedicated to providing exceptional customer service and ensuring customer satisfaction.

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  • Martin-Jetco Heating and Air Conditioning
    4.9
    1327 West Lark Industrial Dr, Fenton, 63026, US

    Since 1964, Martin-Jetco Heating and Air Conditioning has been focused on delivering an amazing customer experience and the best heating and cooling services in St. Louis. Family-owned and operated, we've become the go-to company for all residential and commercial heating and cooling needs in St. Louis. All of our licensed and NATE-certified technicians are committed to providing an unrivaled customer experience. Unlike other companies who are in it to just make a buck, we won't sell you any product or service you don't truly need. When you work with our St. Louis HVAC company, we put your best interests first. As certified dealers of many of the industry’s leading brands, including York, Goodman, Daikin, Carrier, and Trane, you can rest easy knowing that we carry systems designed to last.

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  • Welsch Heating & Cooling
    4.5
    St. Louis, US

    FAMILY AND LOCALLY OWNED SINCE 1895. We strive to be the most TRUSTED Heating and Air Conditioning Company in the St. Louis/St. Charles area with over 127 years of experience. 24-hour service, 7 days a week. Repair, optimize, or check your system. Any Brand, Any System. We service all brands! Request Service Request Estimate. Specials on Heating and Cooling Complete Systems. Save up to $1,600 back! Specials. Get it Fixed By Expert Technicians. Call anytime for home or business! Services. Living Up to Our Commitment. See what made us a national winner! Reviews. What We Offer.

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  • 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.

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  • American Boiler & Mechanical
    4.5
    St. Louis, US

    American Boiler & Mechanical is a family-owned operation that has been providing boiler and mechanical services for over 50 years. Founded in 1973 by Harry Hemphill, the company has grown from a small office and shop in Fenton, MO to a 25,000 square foot headquarters in St. Louis, MO. With a fleet of 85-plus services vehicles, mobile welders, and all the necessary tools, American Boiler & Mechanical is equipped to handle any job, from re-tubing a boiler onsite to piping-in new equipment. While boilers will always be their specialty, their capabilities and expertise have grown over the years to include all mechanical aspects of manufacturing and industrial plant facilities, from basic plant maintenance to complete HVAC, boiler, and process piping replacements and expansions. They pride themselves on their history and look forward to serving their customers with the very best in boiler and mechanical services for the next half century and beyond!

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  • Classic Aire Care
    4.8
    St. Louis, US

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  • Harster Heating & Air Conditioning
    4.5
    St. Louis, US

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  • Vitt Heating & Cooling
    4.7
    4719 Morganford Rd, St Louis, 63116, US

    Vitt Heating and Cooling has very deep ties to St Louis City. It was in St Louis City where the business began back in 1954. Over the years, our company has witnessed the area expand in almost every direction. But unlike a lot of other companies who have moved out of the city limits, we still call St Louis City home. Vitt Heating and Cooling enjoys working on the historical homes of St Louis which is why our certified professional technicians continue to train on the most up to date boiler equipment and maintenance in the industry. If you are in need of service or installation for your HVAC system or air conditioner, give Vitt Heating and Cooling at call at (314) 351-5580.

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Frequently Asked Questions About AC Repair

Is your AC unit not cooling properly? Are you hearing strange noises or noticing unusual smells? Find answers to common questions about AC repair and connect with qualified HVAC technicians in USA.

How do I know if my AC needs repair?

Several indicators can signal that your AC unit needs repair:
  • Warm Air from Vents: Instead of cool air, your vents are blowing warm or room-temperature air.
  • Insufficient Cooling: The AC is running, but your space isn't cooling down sufficiently.
  • Unusual Noises: Squealing, grinding, banging, or other odd sounds are often signs of mechanical issues.
  • Strange Smells: Burning odors, musty smells, or other unusual odors indicate potential problems like electrical issues or mold growth.
  • Leaking Water: Water leaks around the indoor unit can indicate a clogged drain line or other drainage problems.
  • High Energy Bills: A sudden increase in your energy bills might be due to a struggling or inefficient AC unit.
  • Short Cycling: The AC unit turns on and off frequently, without completing a full cooling cycle.
If you experience any of these, contact an HVAC repair professional promptly. Early intervention can prevent minor problems from becoming major expenses.

What is an evaporator coil, and why is it important for my AC?

The evaporator coil is located inside your home as part of the air handler. Its job is to absorb heat from the indoor air. The refrigerant inside the coil evaporates as it absorbs heat, cooling the air that passes over it. This cooled air is then circulated throughout your home. A clean and properly functioning evaporator coil is crucial for efficient cooling. Restricted airflow (often from a dirty filter) or low refrigerant can cause it to freeze, leading to further issues.

What is a condenser coil, and what role does it play in my AC unit?

The condenser coil is a vital component of your outdoor AC unit. It works in tandem with the evaporator coil to complete the cooling cycle. The condenser coil releases the heat absorbed by the refrigerant in the evaporator coil to the outside air. As refrigerant passes through the condenser coil, it condenses from a high-pressure gas to a high-pressure liquid, releasing the heat it absorbed indoors. Keeping the condenser coil clean and free of debris is essential for its efficient operation.

How do I reset my AC unit?

Sometimes a simple reset can resolve minor AC issues. Here's how to reset most residential AC units:1. **Turn off the AC at the thermostat:** Set it to the 'off' position.2. **Turn off power at the breaker panel:** Locate the circuit breaker that controls your AC unit and switch it to the 'off' position.3. **Wait 5-10 minutes:** This allows the system to completely power down and reset any internal electronics.4. **Turn the breaker back on:** Flip the circuit breaker back to the 'on' position.5. **Turn on the AC at the thermostat:** Set the thermostat to your desired cooling temperature.If the problem persists, it's likely a more serious issue, and you should contact a qualified HVAC technician. DIY electrical repairs on AC units are highly discouraged.

How do I know if my AC needs repair?

Several indicators can signal that your AC unit needs repair:
  • Warm Air from Vents: Instead of cool air, your vents are blowing warm or room-temperature air.
  • Insufficient Cooling: The AC is running, but your space isn't cooling down sufficiently.
  • Unusual Noises: Squealing, grinding, banging, or other odd sounds are often signs of mechanical issues.
  • Strange Smells: Burning odors, musty smells, or other unusual odors indicate potential problems like electrical issues or mold growth.
  • Leaking Water: Water leaks around the indoor unit can indicate a clogged drain line or other drainage problems.
  • High Energy Bills: A sudden increase in your energy bills might be due to a struggling or inefficient AC unit.
  • Short Cycling: The AC unit turns on and off frequently, without completing a full cooling cycle.
If you experience any of these, contact an HVAC repair professional promptly. Early intervention can prevent minor problems from becoming major expenses.

What is an evaporator coil, and why is it important for my AC?

The evaporator coil is located inside your home as part of the air handler. Its job is to absorb heat from the indoor air. The refrigerant inside the coil evaporates as it absorbs heat, cooling the air that passes over it. This cooled air is then circulated throughout your home. A clean and properly functioning evaporator coil is crucial for efficient cooling. Restricted airflow (often from a dirty filter) or low refrigerant can cause it to freeze, leading to further issues.

What is a condenser coil, and what role does it play in my AC unit?

The condenser coil is a vital component of your outdoor AC unit. It works in tandem with the evaporator coil to complete the cooling cycle. The condenser coil releases the heat absorbed by the refrigerant in the evaporator coil to the outside air. As refrigerant passes through the condenser coil, it condenses from a high-pressure gas to a high-pressure liquid, releasing the heat it absorbed indoors. Keeping the condenser coil clean and free of debris is essential for its efficient operation.

How do I reset my AC unit?

Sometimes a simple reset can resolve minor AC issues. Here's how to reset most residential AC units:1. **Turn off the AC at the thermostat:** Set it to the 'off' position.2. **Turn off power at the breaker panel:** Locate the circuit breaker that controls your AC unit and switch it to the 'off' position.3. **Wait 5-10 minutes:** This allows the system to completely power down and reset any internal electronics.4. **Turn the breaker back on:** Flip the circuit breaker back to the 'on' position.5. **Turn on the AC at the thermostat:** Set the thermostat to your desired cooling temperature.If the problem persists, it's likely a more serious issue, and you should contact a qualified HVAC technician. DIY electrical repairs on AC units are highly discouraged.