4.6 
148 *The Angi rating for Heating And Air Conditioning Service companies in Alton, IL 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 Alton, IL 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 August 01, 2026
Serving Alton, IL and surrounding areas
Approved
In business since 2006
Free estimates
Emergency services offered
"They are real nice people to work with. I am impress with the stains they got out of my carpet. I will recommend them to my friends, Great customer service."
Serving Alton, IL and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Healthy Home Pest Control & Services were fast, affordable, and professional. I would recommend using them for air duct cleaning services."
Serving Alton, IL and surrounding areas
Approved
In business since 2021
Free estimates
Emergency services offered
"A new hvac venture thatâ s starting off great Super customer service at a good price. Solved vexing thermostat issue quickly Arrived within an hour. Experienced and knowledgeable My new hvac first call"
+2
Serving Alton, IL and surrounding areas
Approved (Corporate)
In business since 1990
Free estimates
Emergency services offered
Your home's plumbing, HVAC, and electrical systems keep your family comfortable and safe. When something goes wrong or you're ready to upgrade, Morrison Plumbing, Heating, Air & Electrical is the Metro East team that delivers same-day service, upfront pricing, and work you can count on.\n\nWe serve Caseyville and surrounding communities through hot, humid summers and cold Illinois winters. Our technicians are licensed, insured, and trained to repair and install heating, cooling, plumbing, and electrical systems so your home stays reliable year-round.
+6
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."
+5
Serving Alton, IL and surrounding areas
Approved
In business since 2003
Free estimates
Emergency services offered
"Great Experience had my air ducts cleaned worried about my Wife â s lungs , Mike and David did a wonderful job very courteous and cordial, cleaned up the mess when they were finished! Thank You Bob! !!!!!!!!"
+6
Serving Alton, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Emergency services offered
Small jobs welcome
"The Steven Brand did a very professional and thorough job. They removed my kitchen cabinet and old stove top to create a space for a 30 inch stove."
+1
Serving Alton, IL and surrounding areas
Approved
Customers say: True professional
"Did an excellent job on my flooring and vanity instal. He also did a few extras that I added on and was very reasonably priced. . He corrected a couple of issues I had from previous jobs not done correctly. Will definitely hire again."
Serving Alton, IL and surrounding areas
Approved
Customers say: Quick response
"Very professional knew what they were doing. I would highly recommend them."
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.
+20
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