We're Open & Here For You! Important Coronavirus Information - Click Here to Learn More

Don't Let "Small" Problems Turn
Into Big Ones. The One Hour Guys Can Help.

Some of Our Specialties
View More Services
Need Help Now? Call Us 24/7

Special Offers Backed by Our
100% Satisfaction Guarantee

No Matter What You Need, Our Pros Are Ready to Help!

Request an Appointment with Your Local One Hour Team Today.
  • Please enter your first name.
  • Please enter your last name.
  • Please enter your phone number.
    This isn't a valid phone number.
  • Please enter your email address.
    This isn't a valid email address.
  • Please enter your address.
  • Please enter your zip code.
    Please enter a valid US zip code.
  • Please make a selection.
  • Please make a selection.
  • Please make a selection.
  • Please make a selection.

Frederick HVAC Company

AC & Heating Repairs You Can Trust

When you need reliable air conditioning and heating services in Frederick from a business you can trust, turn to One Hour Air Conditioning & Heating® of Frederick. We are dedicated to providing top-quality repairs and other services along with the very best customer service. Your comfort is important to us! When you choose One Hour, you get HVAC technicians in Frederick who are extensively trained, experienced, and skilled in repairing, installing, and maintaining heating and air conditioning systems of all makes and models. Enjoy peace of mind with our 100% satisfaction guarantee—we promise we’ll do the job right the first time.

Quality Heating & AC Repair in Frederick

At One Hour Air Conditioning & Heating® of Frederick, we know how frustrating it can be to wait around for a repair technician with nothing more than a block of several hours for a possible arrival window. That frustration goes double when your heater or air conditioner isn’t working properly. Your time is valuable. That’s why we offer an on-time guarantee: Always On Time…Or You Don’t Pay a Dime!® When our friendly and courteous technicians arrive at your home, they’ll get right to work, delivering workmanship that meets or exceeds the highest industry standards. Get in touch with us today for AC maintenance, a furnace inspection, or any other HVAC services you may need.

Always On Time... Or You Don't
Pay A Dime

We Have A Reputation For Being Punctual, Friendly, and Knowledgeable

    “Our tech Larson was amazing!! I am so glad we went with this company!! Originally, we had Michael and Sons come to our house because they had the first available appointment that worked for family. ...”

    - Leilani K.

    “Larson has consistently provided me with outstanding HVAC service! He is highly professional, competent, and personable. I greatly appreciate his “can do” attitude and willingness to go the extra mile ...”

    - Beverly N.

    “James was prompt very professional and personable. Just an all around great guy.”

    - Marian B.

    “Larson did an excellent job on our routine maintenance appointment and was very knowledgeable about what our system will need in the near future. Also was great explaining the process and cost of what ...”

    - Kevin B.

    “Larson was most professional and respectful, he quickly diagnosed the problem, and informed me of what action needed to take place. He didn't oversell anything or resorted to undue influence as I have ...”

    - AK

    “The most recent visit was to install a whole house dehumidifier. Two technicians were involved. Both were very polite, informative, professional and arrived on time. No debris was left after they ...”

    - Clarence L .
/
  • Areas We Serve
    • Adamstown
    • Bowie
    • Braddock Heights
    • Buckeystown
    • Frederick
    • Ijamsville
    • Libertytown
    • Lisbon
    • Monrovia
    • New Windsor
    • Point of Rocks
    • Rockville
    • Sykesville
    • Taneytown
    • Tuscarora
    • Union Bridge
    • Walkersville
    • West Friendship
    • Woodbine
  • Zip Codes We Serve
    • 20715,  
    • 20849,  
    • 21701,  
    • 21702,  
    • 21703,  
    • 21704,  
    • 21705,  
    • 21709,  
    • 21710,  
    • 21714,  
    • 21717,  
    • 21754,  
    • 21762,  
    • 21765,  
    • 21770,  
    • 21776,  
    • 21777,  
    • 21784,  
    • 21787,  
    • 21790,  
    • 21791,  
    • 21793,  
    • 21794,  
    • 21797
We may service additional communities. Please contact us for more information.
  • Google Guaranteed Partner
  • Heroes Club
  • Available 24/7 Blue
  • Air Conditioning Contractors of America
  • Energy Star
  • Better Business Bureau A+ Black and White Image
  • UWin Black Badge
  • PHCC Red Logo
/

Here for You Around the Clock

Our Comfort Specialists are available to help, no matter the time of day. If you're in need of emergency services, we've got you covered 24/7.

Part of the Authority Brands Family

/