In the Knoxville area, A-1 Certified Service, Inc. is well known for providing exceptional furnace repair, installation, and service. The people we send out to serve you are also top notch, something you'll see in their reviews below. Everyone you deal with at our company has the goal of making sure your experience with us will be so good you'll call us every time you need help. You can feel confident working with A-1 Certified Service, Inc. because we stand behind our work and comply with all local codes. This is why, as you can see by the map and reviews below, we are rated so highly for AC, Plumbing, & Furnace Repair in Knoxville, TN in Knoxville TN. Call us today at (865) 691-5088!
Josh was professional, polite, and quick to solve the problem with my ac.
Josh was professional and friendly, quickly diagnosed and fixed the problem.
Did a good service and explained everything he was doing.
I appreciate the way Josh handled our repair. We have been experiencing problems ever since it was installed. Twice due to zip ties that should have been cut when installed. We have put more money into this system than we should have and several times due to the installer. I appreciate the way Josh and A-1 did their best to make it right. Josh went above and beyond and was very courteous. Thank you.
We received great service with a very quick response time! Tommy and Tyler were very professional and helpful. We will definitely use them again and would recommend them to others!
Prompt, efficient service from a friendly fellow.
The guys were friendly, showed the utmost respect to my Mom and her home. Josh, Tyler and Tommy were professional, answered all of our questions and did a great job! We plan to consider A-1 service in the future as well as recommend them to our family and friends.
Polite, quick and Easy
Very polite, checked out the unit on a timely matter, replaced my filters and explained my ticket so I understood what he checked out..
I had basic air sealing done at my home. Built in 1925, it’s very drafty and I’m hopeful the air sealing will make a difference in my KUB bill. Everyone I met with the company was personable and knowledgeable.
Marcus is always such a great guy...both on a business and personal basis. Knows his stuff!
Brandon was very nice and professional. Seems to have fixed problem! Thank you!
My heat pump went out twice in 72 hours during the extremely cold weather. Matt got it running again,took the time to research the history of problems and arranged for a warranty replacement of the heating unit. He was very professional and took the time to explain what he was doing.
I didn’t understand how they were going to fix my ducts and they explained it to me in layman’s terms. They cleaned up after themselves and everything looks great! I had some additional questions and they told me other services they offered. I use these guys for regular maintenance too. Will continue to call on them as this old house grows older!
Marcus was very knowledgeable and very helpful.
Mat was professional and courteous and experienced and arrive at a timely manner thank you
Very good and A-1 Service
I am so grateful for Ms. Shanda, Mr. Josh, Jimmy and Matt Mann. They were very professional, courteous and knowledgeable about the work they were doing at my house. They did not stop until the work was properly installed and perfect! Thanks to this crew...we now have great heat and awesome new windows. It works great and looks good too. Please acknowledge them for there great work, efficiency and effectiveness. They are truly an asset to your company! God Bless. Mrs. Bowman
Matt was our HVAC professional who was prompt, polite, knowledgeable, and skilled.
Service was excellent, courteous and informative
Our HVAC unit was under warranty through A-1. The heat pump wasn't working. They came out same day and got it taken care of under warranty.
1 system Fall maintenance on a Trane gas furnace.
1 system Fall maintenance on a Lennox heat pump and gas furnace.
1 system Fall maintenance on a Daikin heat pump and electric heat package unit.
No heat call on an Amana heat pump.
2 system tune up On an Armstrong gas package and an International Comfort gas furnace
No heat call on a Coleman heat pump and electric heat.
1 system Fall maintenance on a Lennox heat pump and electric heat.
No heat call on a Lennox heat pump and electric heat.
1 system Fall maintenance on a Daikin gas package unit.
1 system Fall maintenance on a Rheem gas package unit.