The Qualifications to Give You Peace of Mind At Parker Pearce Service Experts Heating & Air Conditioning in Gaithersburg, we’ve been serving the community since 1953 and all of our technicians and equipment installers are licensed, highly qualified and NATE-certified. We encourage you to learn about NATE certification and all it entails. It’s a distinguished credential that our service folks have earned through education, know-how, extensive training and testing. So if you should need HVAC service or repair, don’t just call some guy with a few wrenches and a truck. Call 301-476-4577 for Parker Pearce Service Experts Heating & Air Conditioning in Gaithersburg. We have all of the finest qualifications to provide expert furnace and AC repair and service. And all of our work is 100% guaranteed for a full year!