In order to help prevent breakdowns, keep your air conditioning unit at peak performance with routine maintenance or tune ups. Looking for a licensed professional AC repair and maintenance company in Phoenix? We can help. Diamondback Mechanical is the local leading HVAC repair company for over 20 years in Arizona. Tip: Ask one of our service technicians if they have additional information on APS or SRP utility rebates available for your tune-up. We have a satisfaction guarantee and never charge after hours, service or trip fees and our prices remain the same regardless of the day, nights or weekends (No overtime charges apply only for hours of service between 6am-9pm).