We'll Fix Your A/C Today!

No Emergency Fees for Late Night & Weekend Service Visits

A/C Experts Available Now:

Over 36 Years of Reliable Air Conditioning Services in Windsor Mill, MD & Surrounding Areas


We’re the experts you can count on for fast, reliable A/C repair service. Our friendly and professional technicians are available 24/7 to diagnose and repair your A/C system, no matter what the problem is. Plus, don’t day or even weeks for service on your home’s cooling system – we offer same-day service!

Common A/C Problems We Repair:

  • Unresponsive Thermostats
  • A/C Blowing Warm Air
  • A/C Not Blowing Any Air
  • Frozen A/C Equipment
  • A/C Not Turning On
  • Heat Pump Failures
  • Humidifier/Dehumidifier Issues
  • Multi-Zone A/C Systems
  • Equipment Leaks


Experienced A/C Experts Available Around The Clock

When an air conditioning problem makes your home uncomfortable, call Horizon to restore cool, clean air to all areas of your home faster than with any other company. Available 24/7 with NO emergency fees for late nights, weekends or even holidays!

Heating Services

Air Conditioner Repair


Horizon technicians complete 150-hours of training each year and can repair all makes and models of A/C systems. Every repair is backed by a full 2-year parts & labor warranty and we never charge extra for late night, weekend or holiday service. Our trucks are rolling warehouses full of over 1,050 parts so we can guarantee to fix it on the first visit.


A Few of the Services We Offer:

  • 24-Hour Emergency A/C repair
  • Refrigerant Replacement
  • Thermostat Repair & Replacement
  • High-Velocity Unit Repair
  • Heat Pump Repair & Replacement
  • Multi-Zone A/C System Repair
  • Whole House Filter System Repair
  • Central Air Unit Repair
  • Humidifier/Dehumidifier Service

16,800+ Homeowners Trust Horizon

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No One Can Fix Your A/C Faster


Maryland’s Most Trusted Air Conditioning & Plumbing Company Since 1987


We are committed to providing our customers with the highest quality service and backing it with the longest, most comprehensive warranties. We understand that your comfort and safety are important, and we take pride in providing our customers with a worry-free experience.


Why Choose Horizon Services?

  • We offer flexible scheduling, including same-day service and next-day installations.
  • Our technicians arrive on time, every time, or your service is completely free.
  • You’ll receive upfront rates based on the job, not how long it takes to complete.
  • Our techs are background checked, trained, and uniformed for your comfort and safety.
  • We’re available nights, weekends, and holidays at no extra cost.
  • Our fully stocked trucks mean we finish the job on the first visit.


If you are looking for reliable and affordable AC, heating, or plumbing services, contact Horizon Services today. We would be honored to help you keep your home comfortable and safe.