Our Qualifications

Corcoran & Harnist is dedicated to providing you and your family with the best possible service. You can count on us to provide you with a solution that fits your family’s unique needs. With more than 31 years in the heating and cooling business, we service all makes and models and we have earned a reputation for doing the job right the first time.

All of our service vehicles are clearly marked with the Corcoran & Harnist logo and well-equipped to make repairs immediately. Every employee has a proven track record and has undergone a drug test, worker’s compensation background check, driving record check and is covered under our insurance policy. Quick, professional service delivered by our exceptional employees is a tradition Corcoran & Harnist values.

Corcoran & Harnist is certified by the following industry organizations:



Accredited Better Business Bureau


Better Business Bureau

The Better Business Bureau (BBB) system in the U.S. extends across the nation; coast-to-coast, and in Hawaii, Alaska, and Puerto Rico. Since the founding of the first BBB in 1912, the BBB system has proven that the majority of marketplace problems can be solved fairly through the use of voluntary self-regulation and consumer education.

To find out more about our A+ rating with the BBB click here




Carrier Factory Authorized Dealers are the home heating and cooling experts to turn to. They are your single resource for everything you need–from tailoring your ideal comfort system to installation, service and beyond.

Look for the Carrier Factory Authorized Dealer seal of approval–it means your dealer has met rigid criteria for quality. In fact, Carrier offers you a 100% satisfaction guarantee when you purchase your Carrier equipment from a Factory Authorized Dealer. It’s your sure sign of an air conditioning and heating system dealer that will provide you with superior products, intelligent insight and the ultimate service.



NATE or North American Technician Excellence Certification makes good business sense. Certification is about professionalism, pride, knowledge, proficiency and consumer trust because NATE-certified technicians are experts in residential HVAC and light commercial and commercial refrigeration.


Carrier University

The HVAC Training Resource for the Industry

Carrier University provides technical, system design and professional accreditation training to HVAC industry professions including designers, contractors, engineers, dealers, distributors, technicians, operators, maintenance personnel, and building managers. Carrier University offers both on-site and virtual product and service classroom training as well as offering training materials that can be used for self-study, or that can be used to instruct others.



ACCA or Air Conditioning Contractors of America is a nationally recognized group of over 4,000 air conditioning contractors who work together to improve our industry, promote good practices, and keep homes and buildings safe, clean and comfortable.