Your best choice for AC, Plumbing, & Furnace Repair in Knoxville, TN
Since 2000, A-1 Certified Service, Inc. is your best choice for repair, installation, and service in homes and buildings just like yours in the Knoxville area. We take special pride in the craftsmen we train and employ--a fact you'll see in the reviews below. It's also noticeable immediately in the attitude and integrity our technicians bring to your job site. Our entire company works hard to make your experience with us hassle-free and enjoyable. You can also be assured that A-1 Certified Service, Inc. stands behind the work we do as well as complies 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. Call us today at (865) 691-5088!
Local Reviews
for Knoxville, TN
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Liz - Knoxville, TN
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!
Great Service!
John - Knoxville, TN
Prompt, efficient service from a friendly fellow.
Excellent service!
Underwood - Knoxville, TN
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.
We’ve used A1 for several years now,: prompt, courteous, and trustworthy. Highly recommend
Phil - Knoxville, TN
Great Service
Patrick - Knoxville, TN
Polite, quick and Easy
Very professional tech
Wanda - Knoxville, TN
Very polite, checked out the unit on a timely matter, replaced my filters and explained my ticket so I understood what he checked out..
Very good customer service
Critha - Knoxville, TN
Great price! Hoping it helps :)
Jacqueline - Knoxville, TN
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.
You always send the best!
Steve - Knoxville, TN
Marcus is always such a great guy...both on a business and personal basis. Knows his stuff!
Josh is very professional and excellent at explaining the issues and what is needed going forward.
Theresa - Knoxville, TN
Great courteous service.
Rick - Knoxville, TN
Satisfying
Very nice technician
Robert - Knoxville, TN
Brandon was very nice and professional. Seems to have fixed problem! Thank you!
Brandon did a excellent job with the installation and explaining the correct operating procedure to me.
Teresa - Knoxville, TN
Satisfied customer
Kathy - Knoxville, TN
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.
Wonderfully patient experienced workers!
Rita - Knoxville, TN
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!
Excellent service
Geroge - Knoxville, TN
Marcus was very knowledgeable and very helpful.
Knowledgeable and considerable
Tony - Knoxville, TN
Mat was professional and courteous and experienced and arrive at a timely manner thank you
Fantastic service.
Marty - Knoxville, TN
Great
Wanda - Knoxville, TN
Very good and A-1 Service
SATISFIED CUSTOMER!!
Angel - Knoxville, TN
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
Great Service, knowledgeable professional
Mark - Knoxville, TN
Matt was our HVAC professional who was prompt, polite, knowledgeable, and skilled.
Great
Charlene - Knoxville, TN
Service was excellent, courteous and informative
Efficient and knowledgable
Roger - Knoxville, TN
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.
Marcus W.
Repair, Coleman pkg gas
Matt M.
Lennox maintenance
Tyler S.
Finished air seal and duct sealing under kitchen and garage.
Matt M.
Commercial HVAC repair Armstrong air
Marcus W.
Service call, Goodman, no air
Matt M.
New daikin heating and air conditioner installation
Josh Y.
Ac repair
Josh Y.
Daikin mini split
Josh Y.
Gas lite bar for wood fire place
Josh Y.
Ac maintenance and repair
Marcus W.
TXV Repair Rheem pkg gas
Tyler S.
Finished air sealing and home improvement.
Tyler S.
Finished air sealing and home improvement
Matt M.
Amana air conditioning maintenance
Matt M.
Rheem classic air conditioner repair
Marcus W.
2 system cooling pm Rheem pkg gas and Daikin Air
Matt M.
Amana heat pump repair
Matt M.
Amana heat pump re pair
Marcus W.
Service call, no Heat Aire-Flo
Marcus W.
Service call, no Air Coleman pkg HP
Marcus W.
Cooling pm Daikin HP
Marcus W.
Cooling pm. Lennox HP
Marcus W.
Heat maintenance, Daikin HP
Marcus W.
Heat maintenance, Comfortmaker gas.
Scott H.
Plumbing new construction
Marcus W.
Heat maintenance, Amana HP
Marcus W.
Service call, no heat, Rheem pkg gas
Marcus W.
Repair, Lennox HP
Matt M.
Lennox heating and air unit maintenance
Josh Y.
Wall insulation
Marcus W.
Service call, no heat, Coleman pkg hybrid
Marcus W.
Service call, no heat, Rheem pkg gas
Marcus W.
2 system cooling Maintenance, Coleman HP
Josh Y.
New duct sox install on a commercial warehouse
Tyler S.
Duct seal. (Bring shop vac for boots. All under 1 except front bedroom)
Tyler S.
Water heater insulation installed
Tyler S.
Smoke alarms and Co monitor installed
Josh Y.
Josh Y.
Two five ton air handlers in a commercial warehouse
Tyler S.
Replacing dryer vent
Marcus W.
Heat maintenance, Coleman HP
Marcus W.
Service call, Lennox dual fuel
Marcus W.
Repair Coleman Pkg Gas
Josh Y.
New daikin heat pump install
Tyler S.
Changed lights
