Top-rated heating and air conditioning pros.

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

Enter your zip and get matched with up to 5 pros

Need a pro for your heating and air conditioning service project in Union, MO?

Select your specific project to find the pro for you.

TRUSTED BY UNION, MO HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon100
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Union

Avatar for Arrow Mechanical
Arrow Mechanical
4.5(
61
)

Serving Union, MO and surrounding areas

Approved

In business since 2017

Emergency services offered

Warranties offered

"They addressed my air conditioning problem promptly, gave 3 options to address the problem, provided and installed 2 temporary room air conditioners, had reasonable and fair pricing, and did the work promptly and well!!!"
Commercial refrigerator
Geo thermal
New water pressure tank and electric water heater
New electric water heater
Response time6 hrs
Response rate85%
Recommended by96%of homeowners
Avatar for Show-Me Comfort LLC
Show-Me Comfort LLC
5.0(
5
)

Serving Union, MO and surrounding areas

Approved

Hello, My Name is Johnathan Steele, Owner Operator of Show-Me Comfort Heating and Air Conditioning. I started my company with the intent to help and show transparency to my customers and to educate them to the best of my abilities on the system that keeps their Home Comfortable. Most Companies will come in to a house fix the issue then leave… That’s where we try and separate ourselves by finding the culprit, educating our customers on why it happened and how to prevent future problems. \n\nWe at Show-Me Comfort Heating and Air Conditioning take pride in our work, and if we wouldn’t do it in our house we wouldn’t do it to yours.

10 neighbors recently requested a quote
Avatar for GAS GURUS LLC
GAS GURUS LLC
5.0(
17
)

Serving Union, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"Only professional to help when I was having issues with my gas leaving us with no heat in the middle of winter on a Saturday. Was able to fix issue fast and provide extra support. Highly recommend for all your gas related problems."
Response time10 hrs
Recommended by20%of homeowners
Avatar for CLIMATE CREW HEATING & COOLING LLC
CLIMATE CREW HEATING & COOLING LLC
5.0(
5
)

Serving Union, MO and surrounding areas

Approved

In business since 2024

Free estimates

Warranties offered

We pride our company on reliability, great communication, \nintegrity, and quality work. We are experts in our trade and will do our best \nto keep you as educated as we can on your particular task or project. We are locally owned and operated. Give us a call today, we look forward to earning your business!\n

8 neighbors recently requested a quote
Avatar for Local Air Duct Pros
Local Air Duct Pros
4.5(
15
)

Serving Union, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"Thank you for your trust! At Local Air Duct Pros we specialize in professional air duct cleaning, dryer vent cleaning, chimney sweep, and attic insulation. Our licensed and insured team is committed to providing top-quality service at fair prices. We appreciate your support and look forward to serving you again!"
Response time7 hrs
Response rate97%
27 neighbors recently requested a quote
Avatar for FixPro
FixPro
5.0(
5
)

Serving Union, MO and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

FixPro is a locally owned and operated handyman service proudly serving St. Louis, St. Charles, Lincoln, Warren, Franklin, and Jefferson Counties. We specialize in high-quality home repairs, carpentry, drywall, painting, flooring, deck repair, and general maintenance—handling everything from small fixes to larger improvement projects with precision and professionalism.\n\nWith years of hands-on experience across construction, maintenance, and service industries, I built FixPro to deliver what most contractors don’t: clear communication, reliable scheduling, and work done right the first time. We show up when we say we will, diagnose issues properly, and provide straightforward solutions without cutting corners.\n\nOur approach is simple—treat every home like it’s our own. We focus on clean workmanship, long-term durability, and customer satisfaction. If you want it done right the first time, FixPro is ready.\n\nNeed Something Fixed? Hire a Pro.

1 neighbors recently requested a quote
...
Showing 1-10 of 104
Heating and Air Conditioning questions, answered by experts

Window AC units use a fair amount of electricity, but significantly less than central AC systems. Because they are more energy-efficient for cooling individual rooms or small spaces, their usage is comparatively low. On average, a window AC unit consumes between 500 and 1,400 watts, while a central AC system uses over 3,500 watts—meaning a window unit uses about one-third of the energy. This typically translates to a monthly running cost of $15 to $40, although this can vary depending on external factors.

For the most part, you should leave your AC fan in “auto” mode so that it only runs during a heating or cooling cycle. Keeping it in this position uses less energy, which equals lower utility bills. However, there are some situations where it’s better to leave your AC fan on, including if you have allergies or there are lots of people in your home.

At a minimum, an HVAC system should be serviced once per year. However, a twice-a-year service schedule—once in the spring for the cooling system and once in the fall for the heating system—is often recommended, especially for older systems, heat pumps, or in climates with extreme temperatures. Regular service, which includes inspection, cleaning, and maintenance, ensures the system runs efficiently, helps prevent costly breakdowns during peak seasons, and can extend the unit's lifespan. You can also schedule a service if you notice issues like poor performance or strange noises.

It depends on the type of AC unit and the extent of the mold growth. For example, if you have a small amount of mold in your central air conditioner, it’s worth cleaning it to protect your HVAC system and your health. In situations like these, you can often remove the mold yourself in a couple of hours. On the other hand, if you have a portable AC unit with a severe mold problem, it makes more sense to buy a new one. On average, replacing a portable AC unit costs $100 to $500.

When faced with HVAC issues, it's best to begin by ensuring the thermostat settings are correct for either heating or cooling. If the system isn't responding, check the thermostat for proper function and power supply. It's also important to examine air filters, as clogged ones can decrease performance. Confirm the power supply to the system by checking the circuit breakers and fuses. If these basic steps fail to resolve the issue, contact an HVAC professional for a more detailed diagnosis and repair.

The Union, 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.