Cooling System Service and Repair in Flagstaff and Phoenix, AZ

Your vehicle’s cooling system plays a critical role in engine performance and reliability. It works by circulating coolant through the engine and radiator to absorb and release heat, preventing the engine from overheating. A properly functioning cooling system ensures optimal engine temperature, fuel efficiency, and longevity. At Randy’s Downtown Garage in Flagstaff and Phoenix, AZ, we specialize in complete cooling system service and radiator repair for all types of vehicles. Our ASE-certified technicians are experts in diagnosing overheating issues, coolant leaks, and radiator failures to keep your engine protected in Arizona’s demanding climate.

Cooling System Service in Flagstaff and Phoenix, AZ

We service all makes and models, including cars, trucks, SUVs, and diesel vehicles—both foreign and domestic. Our shops are equipped with state-of-the-art diagnostic tools to accurately pinpoint cooling system problems. All repairs and parts are backed by our 2-year/24,000-mile warranty, giving you peace of mind long after the service is done. Whether it’s a radiator replacement or a simple coolant flush, we’ve got you covered. Here are common signs that your cooling system or radiator may need attention:

  • Engine overheating or temperature gauge rising

  • Coolant leaking under the vehicle

  • Low coolant warning light

  • Steam or smoke from under the hood

  • Rust-colored coolant or debris in the radiator

  • Heater not working properly

If you’re experiencing any of these symptoms, don’t ignore them—cooling system issues can quickly lead to major engine damage. Bring your vehicle into Randy’s Downtown Garage for a full inspection. Our team will test your coolant, check hoses and the radiator, inspect the water pump and thermostat, and look for signs of wear or blockage. We'll explain any issues in simple terms and provide a clear repair plan. Routine maintenance like radiator flushes and coolant replacement can help prevent overheating and extend the life of your engine.



While we service your cooling system, we also make your experience as easy and comfortable as possible. We offer free shuttle service, or we’ll gladly arrange a complimentary Uber or Lyft ride so you’re never stuck without transportation. With clean, modern shops in both Flagstaff and Phoenix, you can count on reliable service and a welcoming atmosphere every time you visit.

Radiator Repair in Flagstaff and Phoenix, AZ

Trust the pros for cooling system service and radiator repair in Flagstaff and Phoenix, AZ. Call your preferred Randy’s Downtown Garage location or schedule your appointment online today.

Randy's Downtown Garage - Taking Care Of Your Vehicle’s Cooling System Right.