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TRUSTED BY ALTON, IL HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon148
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Alton - Updated Nov 2026

Avatar for Healthy Home Pest Control & Services
Healthy Home Pest Control & Services
4.4(
387
)
Air Ducts & Vents - Clean

Serving Alton, IL and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"HIGHLY RECOMMEND! Did much research on companies 1st b/c I was aware of scams with duct cleaning. But this company is very legitimate professional - techs and receptionist, all the way around! Top quality service! On time and will answer any questions and explain it all in great detail? very polite and professional. And yes, they will take photos throughout if you want to see exactly the differences of before and after. I had bought a 1959 home which had never been cleaned. See my before/after photos. Before, I kept having to wipe off my counter tops a few times a day because they always felt gritty. After the duct cleaning, they stay clean now - A HUGE DIFFERENCE! The guys were awesome and went above and beyond by also helping me carry a heavy appliance from upstairs to my basement. Very nice guys! They cleaned up any mess before leaving, like they had never there. You will not regret using their service. Lower Price than others too! Thanks Danny & Cameron! Great Work!"
New Trucks
Duct Cleaning Trailers
New Sign
Response time9 hrs
Response rate95%
507 neighbors recently requested a quote
Tiger Plumbing, Heating, Air Conditioning, & Electrical Services
3.4(
357
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallAir Ducts & Vents - Clean+12 more

Serving Alton, IL and surrounding areas

Approved (Corporate)

In business since 1993

Free estimates

Emergency services offered

"2 friendly guys that did awesome work. Transfer switch works great and it's nice to see them clean up when done. I would definitely use the tiger again for electrical work."
Additional Photos
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+5

308 neighbors recently requested a quote
Recommended by73%of homeowners
C Hatcher Construction
4.8(
11
)
Thermostat - Install or ReplaceThermostat - Repair or Reprogram

Serving Alton, IL and surrounding areas

Approved

Customers say: True professional

"No matter what problem you have, Clint is the man for the job! He not only fixed the plumbing issues I discovered during a remodel but was able to fix the electrical issues, flooring problems, install the cabinets, cut and grout backsplash tile, and fix a handful of minor issues that came up along the way. Clint is on time, dependable, courteous and respectful of your property - he even cleans up afterwards! I could not have completed this project without Clint Hatcher and highly recommend him to anyone who needs work done - you will not be disappointed!!"
Response time1 day
Response rate100%
Recommended by70%of homeowners
Avatar for ARCO Heating & Cooling
ARCO Heating & Cooling
New to Angi
Central A/C - Service or RepairCentral Air Cleaner - Repair or ServiceElectric Furnace / Forced Air Heating System - Repair+6 more

Serving Alton, IL and surrounding areas

Approved

In business since 1963

Free estimates

Warranties offered

For more than 60 years, ARCO Heating & Cooling has been the local HVAC company that residents and businesses turn to for their heating and cooling needs. What began as a small business has grown into a cornerstone of the St. Charles, St. Louis, & Illinois communities, providing dependable service designed to keep our neighbors comfortable year-round. As a family-owned, local HVAC company, we’re more than just a service provider—we’re part of the community. We live and work right here in the St. Charles, St. Louis, & Illinois Metro areas, so we understand the unique climate challenges our neighbors face. This local connection fuels our dedication to providing personalized service and dependable solutions that make life easier for our customers.

AC Data Plate
AC Wiring
AC Wiring 2
AC Voltage Readings
TitleAC Wiring 3

+20

Response time8 hrs
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Heating and Air Conditioning FAQs, answered by experts

You may be able to clean mold from your air conditioner in some cases. If the mold growth only takes up a small area, you can use either vinegar or bleach mixed with water to remove it. Larger areas of mold should be left to the professionals, though. It's also a good idea to leave mold removal to the pros if you are sensitive to mold or have asthma. 

In most cases, you should hire a professional to carry out services on your HVAC system, as the components are complicated, expensive, and potentially dangerous to work with. However, there are a few things you can do on your own to keep your HVAC system in good condition, including changing your filters every three months, keeping the area around your outdoor condenser clear of debris and plant growth, making sure your or intakes aren’t blocked, and keeping an eye out for increased energy bills, strange noises, and unusual odors related to your equipment.

A common HVAC rule is that for every 500 to 600 square feet of living space, you need 1 ton of heating or cooling capacity. Now that you know this common rule, you also need to know that it isn’t very accurate, and a dedicated pro wouldn’t use it for your home. If you talk to a pro who won’t or can’t perform a proper Manual J calculation, consider hiring someone more thorough.

AC drip pans last five to 20 years, depending on the material. Plastic AC drip pans last five to 10 years, while metal pans can last over 10 years. Plastic AC drip pans are vulnerable to cracking in response to temperature changes. Metal drip pans are prone to rusting over time, which can also lead to leaks.

A blocked return air vent can cause your HVAC system to work much harder and, therefore, less efficiently. The result is higher utility bills and poorer air quality. A blocked return air vent can also cause unpleasant dust, dander, and odors to linger in your home’s air.

The Alton, IL 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.