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Harford County, MD
Harford County, MD
Bringing Comfort Home
Harford County HVAC Services
One Hour Air Conditioning & Heating® of Harford County
4.8
Heating, AC & Furnace Repairs in Harford County, MD
When homeowners want a reliable heating or air conditioning system that they don’t have to think about, they call One Hour Heating & Air Conditioning. We are the premier HVAC service provider in the United States for a simple reason: we actually care about your comfort.
At One Hour, we respect you, we respect your time, and, most importantly, we respect the trust that you put in us to keep your home comfortable. It’s why we back all of our work with a 100% customer satisfaction guarantee for two years, and it’s why we’re always on time—guaranteed.
We Have a Reputation
For Being Punctual, Friendly and Knowledgeable
4.8
Bubble tea Green
10-21-2025
“Excellent services and great at satisfaction I would use them again thank you for all your help.”
Adedayo Leke
10-19-2025
“Michael the technician is good at what he does. After the maintenance, there were a couple of things he recommended doing and also alternatives were given if applicable to one not being able to afford the"Royal Carpet". You should be able to find a common level since the cold season is coming. He is a great guy and I will say any job he goes to, the client should relax and let him do his job.”
Ken Sabel
10-13-2025
“Damon did a great job! Please be sure to send him next time.”
Mary Hinegardner
10-13-2025
“Great technician! Damon is very knowledgeable and honest! Very good personality.”
David Brundage
08-14-2025
“Highly satisfied customer. Majdi came out on time and was extremely knowledgeable and professional. Identified the problem right away. Pricing was very fair. I was so happy with the service I signed up for a service membership with them that day.”
Antwan Chambers
07-23-2025
“Fair pricing, punctual, left the work area cleaner than when started, and finished on time. A quality experience; I'd recommend.”
Sara Davenport
06-18-2025
“Awesome service! I cannot say enough good things about this company. Steve S was absolutely amazing and professional he explained everything in detail and was very knowledgeable, friendly and respectful”
Pam Santo
06-12-2025
“Brandon was a very nice, polite and professional tech. Explained as he went so I could understand. Prices well”
Gerald Gionet
05-07-2025
“Brandon from one hour heating was attentive, professional and knowledgeable.”
Carlos Almeida
05-06-2025
“Excellent service. Quick response. Real gentleman. Found a simple fix to a problem where we thought we needed to replace the entire the unit. My wife felt immediate relief from the intense pressure of paying for an entire unit.”
Our customers love what we do because we treat them like the neighbors they are to us. While we carry the One Hour name, we’re an independently owned and operated business with a personal investment in the local community. We back our work with a 100% satisfaction guarantee, provide StraightForward® pricing guides for your benefit, and will pay you back for being even one minute late to an appointment.
Here For You
When You Need Us Most!
'Round the Clock Availability
No matter the hour, you can trust One Hour to be there to help you when you get hit with the unexpected.
100% Satisfaction Guarantee
We guarantee our materials, labor, and craftsmanship for up to two years from the date of your service.
StraightForward Pricing® Guide
Before we start any work, we discuss your available options so you know exactly what you are getting and how much it will cost. No hidden fees!
Always On Time…Or You Don’t Pay A Dime!®
We understand your time is valuable, so we promise to arrive at your home within the predetermined time window that you select, or your service call is free.
Financing Available!
Prioritize your comfort without fronting the entire bill on day 1 – contact us today to learn more about financing options.
Hours of Operation
We are available 24/7 to take your call for emergencies. For all other services, our appointment hours are:
Monday
24 hours
Tuesday
24 hours
Wednesday
24 hours
Thursday
24 hours
Friday
24 hours
Saturday
24 hours
Sunday
24 hours
Authority Brands is the leading provider of in-home services, building brands that support the success of franchisees as well as better the lives of the homeowners we serve and the people we employ.
