*The Angi rating for Air Conditioning companies in Dahlgren, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.
*The HomeAdvisor rating for Air Conditioning companies in Dahlgren, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.
Last update on June 17, 2026
Serving Dahlgren, IL and surrounding areas
Approved
In business since 2025
Free estimates
Credit card accepted
"Jeremiah was absolutely wonderful! Got the job done extremely fast. Would definitely recommend to anyone that needs heating and cooling services"
Serving Dahlgren, IL and surrounding areas
Approved
In business since 2013
Free estimates
Credit card accepted
"Professional, courteous, very nice staff, always pleasant to deal with, and did their job Johnny on the spot!"
Serving Dahlgren, IL and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"Very professional and competent service at a very reasonable price. I will certainly use them for any HVAV work needed."
Serving Dahlgren, IL and surrounding areas
Approved
In business since 2002
Free estimates
Credit card accepted
Service Tek, Inc., provides full-service heating and AC installations and repair work to the Olney area. We are highly trained in today's efficient product lines. We also install thermal units.
Serving Dahlgren, IL and surrounding areas
In business since 2017
Free estimates
Credit card accepted
"They showed up on time. Replaced gas furnace and central air conditioning. Completed job in 1 day. I was happy with their professionalism and would not hesitate to hire them again"
+1
Serving Dahlgren, IL and surrounding areas
In business since 2010
Emergency services offered
Credit card accepted
"Mr. Ferrell worked with my husband over the phone to fix the problem. It was surprisingly fast and stress-free. To have the work done remotely in less than an hour was wonderful."
Serving Dahlgren, IL and surrounding areas
In business since 2016
Free estimates
Emergency services offered
"He was the best bang for my buck. He broke things down for me to understand."
Serving Dahlgren, IL and surrounding areas
Free estimates
Emergency services offered
Credit card accepted
"Rardins has merged with Mattex Plumbing, but Oscar Rardin is still with them. Very professional, both over the phone and kept me updated through texts on the phone. Showed up as promised and was done within 3 hours. Only real difference was in how prices have inflated since 2014 (last time pump was replaced) $1400 vs $500 The pump accounted for over $1200 of that total. Oscar did a excellent job!"
Serving Dahlgren, IL and surrounding areas
In business since 1893
Free estimates
Warranties offered
"The team from A-1 Interstate Mechanical were great they did a good job were on time and showed respect for my home and me."
Serving Dahlgren, IL and surrounding areas
In business since 1970
Free estimates
Emergency services offered
"He was professional and found the problem quickly. He was very pleasant. The price and service was excellant"
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