Reliable Cooling Services Across Central Maryland

When summer heat hits Ellicott City to dynamic Towson, homeowners count on Diagnostic Heating & Air Conditioning to keep their homes cool and comfortable. With over 12 years of licensed, professional HVAC experience, our team delivers dependable cooling solutions for families in Randallstown, Owings Mills, Pikesville, Reisterstown, and beyond.

Whether you need a quick repair, a brand-new AC system, or a modern smart thermostat, we provide honest recommendations, upfront pricing, and five-star customer care.

Air Conditioning Installations

A reliable air conditioning system starts with professional installation. Our expert technicians help you choose the right-sized unit for your home’s layout, energy needs, and budget.

We install leading brands known for performance and efficiency—so you enjoy cool comfort, lower energy bills, and lasting reliability.

Our AC installation services include:

• Central air conditioning systems
• Ductless mini-split systems
• Energy-efficient replacements
• System design and optimization
• Smart thermostat setup with new installs
  

Air Conditioning Repairs

When your AC stops cooling, leaks, or makes strange noises, don’t sweat it—our fast, professional repair service gets you back to comfort quickly.

We service all makes and models of air conditioning systems and carry most parts on our trucks for same-day repairs.

Common issues we fix:

• Warm air or poor cooling
• Leaking or frozen coils
• Strange noises or smells
• Thermostat problems
• Electrical or capacitor issues

We’re committed to transparent pricing and honest diagnostics—no unnecessary upsells, just reliable repairs that last.