Best AC Repair Sachse TX – GAC Service Co.’s #1 Goal is to supply Sachse TX residents and businesses with the highest quality heat and air services available. Regardless of it being a simple ac repair or a large central heat and air conditioning installation, our highly trained technicians will meet and exceed your expectations. We love to make our customers happy and will do everything possible to make sure you receive the best service and support. We have been serving the Colling and Dallas area since 1977 with the following services: Fast Same Day AC & Heating repair Service available 24×7 At GAC Service Co., not only are our certified and friendly technicians able to repair all your air conditioning and heating equipment, our office staff is also trained and extremely knowledgeable. We stock many components in our service trucks to help get your system back up and running quickly. We offer emergency service 24×7 because service isn’t just needed during “normal” business hours!