How often do you need to add Freon to an AC?

• <div><p>Good news: Your AC system doesn’t need Freon (a popular refrigerant) added regularly, if ever. Freon only needs to be added when there’s a refrigerant leak; however, it’s not uncommon for a gradual leak to occur every 5 to 15 years. Signs of a refrigerant leak include higher utility bills, increased humidity in the house, weakened AC performance, and a hissing sound from the system.</p></div>

Will cleaning my AC filter make it colder?

• <div><p>A dirty AC filter can lower the efficiency of your system, so depending on how dirty it was, you may notice a temperature difference when you clean your filter. You can try other solutions if your AC isn’t blowing as cold as it used to. You can call in a <a href="https://www.angi.com/nearme/hvac-companies/">local HVAC tech</a> to make sure everything is running correctly, fix your air seal if it’s a window unit, and clean your coils.</p></div>

How do you fix uneven airflow in HVAC?

• <div><p>You can adjust uneven airflow in your home by adjusting the dampers on the vents. However, if the temperature feels consistent throughout the home, don’t worry too much about uneven airflow. Generally speaking, larger rooms should receive more airflow than smaller rooms, especially if they only have one vent.</p></div>

Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in Farmington, MO

There are 7 highly-rated local heating and air conditioning pros.

TRUSTED BY FARMINGTON, MO HOMEOWNERS

4.6
Average homeowner rating
190
Verified heating and air conditioning services reviews

Verified Reviews for Heating And Air Conditioning Service pros in Farmington, MO

*The Angi rating for Heating And Air Conditioning Service companies in Farmington, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Farmington, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

Last update on October 18, 2025

Reviewed in August 2017
Everything went very well, this is the second AC System they have intalled for us and all working well; Highly recommend this company for Heating & AC System repairs or replacements
GARWOOD'S HEATING & COOLING, Inc.
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Reviewed in December 2016
My house is not large, approximately 2900 sq. ft. and uses two HVAC systems, one larger unit and one smaller unit. American Air Heating and Cooling inspected the existing HVAC system. Mark and Jeff arrived on Monday, 12/12/16 to evaluate the two existing HVAC systems, which took about one hour....
American Air Heating & Cooling
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Reviewed in March 2015
After several attempts by me to restart the pilot light, I called John. He came out later that day. He had replaced this water heater 2 years ago. As it turned out the gas valve regulator was defective. He ordered the part that night. The next morning he took the defective part to the parts...
J M HEAT & COOL
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Reviewed in April 2014
John A. is the rep who visited my home. He put boot covers on his shoes before entering the house. He went straight to work and did a great job. He has been to my home before and he is very professional and knowledgeable. I have nothing but kudos to give to John A. and Sigman Heating & Air...
Sigman Heating & Air Conditioning Inc
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Reviewed in November 2013
I had called them but because it was Sat. and the add in the yellow pages said mon/fri, I took the first person to respond to my phone calls. I did leave a message to Mr. Koppeis. They called me while the other service person was there ,who was trying to sell me a new air conditioner. After the...
Koppeis Heating & Cooling
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Reviewed in February 2013
Terry returned our calls promptly, scheduled the work, showed up on time and performed the work in an exemplary way .I highly recommend Terry Cope and King Plumbing Heating and AC in terms of work quality, professionalism and value.
King Plumbing Heating & AC
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Reviewed in October 2012
Today as all other appointments with Chris went as planned, EXCELLENT! Choose Martinussen Electric. Chris is professional, organized, timely, and honest. It is scary searching for someone to maintain or repair the home, therefore, I came on Angie's List to share with others that if you are...
Martinussen Electric Co, LLC
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Reviewed in October 2011
I had to call them for an emergency and they sent someone out right away. They are very knowledgeable and professional. They service both my heating and A/C. They have a good reputation in our area. My friends use them, as well.
HAASE HOME SUPPLY
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Find Heating and air conditioning pros in Farmington

Perfect Air

Perfect Air

Customers say: True professional

Recommended by 100% of Angi customers

31 local quotes requested

Founded in 1982. Team members that are drug tested and background checked insuring that the people in your home are safe. We specialize in repairing and replacing residential heating and air conditioning systems. "Fixed Right or It's Free" Techs available Sat & Sun call for appointment.

Randolph Electrical Contracting

Randolph Electrical Contracting

Customers say: Quick response

Recommended by 97% of Angi customers

6 years of experience

Randolph Electrical Contracting is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"Max was excellent and his employees extremely polite and professional. They wired a whole house for us and he came quickly when we needed him. We would hire him again if we needed any electrical work. A real pleasure of a transaction. Thanks Max!!"

Keith H on December 2022

"Max was excellent and his employees extremely polite and professional. They wired a whole house for us and he came quickly when we needed him. We would hire him again if we needed any electrical work. A real pleasure of a transaction. Thanks Max!!"

Keith H on December 2022

SDK Repair

No reviews yet

SDK Repair

No reviews yet

Emergency services offered

Since 1993 HVAC repair is what I base my business on. Diagnostic. Yup I work on AC Condensers, heat pumps, air handlers, gas furnaces, electric furnaces, propane furnaces, hydronic boilers, steam boilers, geothermal or ground source systems. Ductless split systems.

Berry plumbing & Contracting LLC

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Berry plumbing & Contracting LLC

No reviews yet

Berry's plumbing & contracting LLC All your plumbing needs. From snaking drains. To water heater. Faucet repairs. New shower units. Bust pipes we are here

Plumbing Repair French Village MO

6200 Office Rd

No reviews yet

Plumbing Repair French Village MO

6200 Office Rd

No reviews yet

Free onsite estimate

Welcome To Plumbing Repair French Village MO. If you have any Issues about Plumbing OR you have any Issues about your Heating or Cooling System? Our Technicians fix all Problems. We take pride providing customer satisfaction and quality. We are a complete plumbing service company that has been around for more than a decade. Our growth has been massive over the years because our services and staff is can’t be compared to any other company. We have a trained team of professionals that specialize in all sorts of plumbing services and HVAC for both residential and commercial needs. Our services include: drain cleaning, sewer, garbage disposal replacement, clogged kitchen sink, faucet replacement, home stoppage, back flow tests, Heating And Cooling, Heating And Cooling Services, Air Conditioning Service, bathroom remodeling and much more! We Offer these services 24-hour plumbing & HVAC Service, line and leak detection, garbage disposer repair, water supply line replacement / repair, dishwashers and ice maker water lines, heating & cooling any issues. Emergency service is our specialty. Complete Residential & Commercial Plumbing & HVAC Services, Local Plumbing, Local Seattle Plumbing Company, Plumbing, Kitchen, Bathroom Plumbing, HVAC and other all type plumbing & HVAC services, plumbing repair, residential plumbing, commercial plumbing, bathroom plumbing solutions, trench less sewer line repair and replacement, pipe bursting, pipe relining, kitchen plumbing jobs, sink plumbing, toilet repair / replacement, water heaters, sump pumps, faucet replacement, video camera pipe inspections, back flow certification and repairs, Plumbers, Plumbing, Plumbing drain & sewer cleaning, Plumbing contractors commercial industrial, Fire water damage restoration, Water heater repair, Sewer cleaners & repairers All of our plumbers are licensed, professional and reliable. We provide estimates for every project and we offer guarantees on all of our work. Call us any time on 5739230785

All Climate Mechanical

2040 Meramec St

No reviews yet

All Climate Mechanical

2040 Meramec St

No reviews yet

We are a heating and cooling, commercial refrigeration, and commercial kitchen equipment service contractor offering services to residents and businesses of Franklin County, St. Louis County and surrounding areas.

Neli Virtual Appliance Repair

Neli Virtual Appliance Repair

Customers say: Super punctual

32860 local quotes requested

NEW! Appliance Consultation – Just $35 Get expert advice before you spend on repairs or replacements. A Neli technician will evaluate your issue and help you decide if your appliance can be fixed—or if it’s time for a new one. Virtual Appliance Diagnosis and Repair - Just $45 Service Description: Diagnose or repair your appliance virtually—no need for anyone to enter your home. Neli’s certified technicians guide you step-by-step via secure video chat. How It Works: Book online at nelihome.com or call 833-876-0900 Connect with a tech through our video platform Diagnose or fix the issue in real time Get expert advice and confidence in your next steps What’s Included: Real-time video guidance from a certified technician Diagnosis of the issue OR full repair (when possible) Step-by-step guidance using your smartphone or tablet Safe, contact-free service - no one in your home Flexible scheduling—appointments available daily Perfect For: Appliance fixes HVAC troubleshooting DIY-savvy homeowners Saving time and money on service calls

"Great! Punctual easy to work with cleaned up area when done"

Kay J on September 2025

"Great! Punctual easy to work with cleaned up area when done"

Kay J on September 2025

All general home repairs under one roof.

Brooks Heating & Cooling

1725 Crosby Ln

No reviews yet

Brooks Heating & Cooling

1725 Crosby Ln

No reviews yet

Brooks Heating & Cooling has been a leading HVAC Contractor in the Florissant and surrounding areas for 25 years. Whether it's air conditioning repair and installation in time for summer, or heating repair to stay warm in winter, Brooks has you covered. We offer fast and affordable service with unmatched quality of work. Contact us today and see why no other air conditioning service or heating contractors will leave you with the guaranteed satisfaction that Brooks Heating & Cooling brings.

...

Showing 1-10 of 185

Heating and Air Conditioning questions, answered by experts

Good news: Your AC system doesn’t need Freon (a popular refrigerant) added regularly, if ever. Freon only needs to be added when there’s a refrigerant leak; however, it’s not uncommon for a gradual leak to occur every 5 to 15 years. Signs of a refrigerant leak include higher utility bills, increased humidity in the house, weakened AC performance, and a hissing sound from the system.

A dirty AC filter can lower the efficiency of your system, so depending on how dirty it was, you may notice a temperature difference when you clean your filter. You can try other solutions if your AC isn’t blowing as cold as it used to. You can call in a local HVAC tech to make sure everything is running correctly, fix your air seal if it’s a window unit, and clean your coils.

Yes, technicians check refrigerant levels, loop performance, and system calibration for peak efficiency.

You can adjust uneven airflow in your home by adjusting the dampers on the vents. However, if the temperature feels consistent throughout the home, don’t worry too much about uneven airflow. Generally speaking, larger rooms should receive more airflow than smaller rooms, especially if they only have one vent.

If both your furnace and AC unit are more than a decade old, it may be a good idea to replace both of them. However, your furnace can last up to three decades, and your air conditioner can typically last up to 15 years, so consulting with a pro before deciding to replace both of them is best. If it’s before that time limit for each, you can fix many problems with repairs or just replace one.

The Farmington, MO homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

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•
Jun 12, 2025Jun 12, 2025
How Much Does an HVAC Inspection Cost? [2025 Data]
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Aug 12, 2025Aug 12, 2025
How Much Does It Cost to Install Ductwork? [2025 Data]
Discover the cost to install ductwork. Learn about average prices, cost factors, and tips to save money on your ductwork installation project.
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•
Oct 9, 2025Oct 9, 2025
How Much Does It Cost to Replace a Gravity Furnace? [2025 Data]
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Aug 15, 2025Aug 15, 2025
How Much Does Wall Heater Installation Cost? [2025 Data]
Discover the average wall heater installation cost, key price factors, and expert tips to help you budget and save on your next home heating project.
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Aug 20, 2025Aug 20, 2025
Understanding Plenum in HVAC Systems: The Homeowner’s Guide to Better Airflow
Not sure what a plenum does in your HVAC system? This guide breaks down what it is, what it does, and why it’s more important than you think.
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Sep 9, 2025Sep 9, 2025
3.5 CFM vs. 5 CFM: What’s the Difference?
Discover the differences between 3.5 CFM and 5 CFM vacuum pumps, including which option is best for HVAC jobs and how to choose the right one for you.