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Contents

  • Power Supply Issues
    • Check the Circuit Breaker
      • Inspect the Power Supply
      • Thermostat Problems
        • Air Filter Issues
          • Condensate Drain Problems
            • Faulty Components
              • Capacitors and Contactors
                • Fan Motor Issues
                • Safety Switches
                  • Refrigerant Issues

                    Common Reasons Why an AC Unit Won't Turn On

                    contributorcontributorcontributor
                    2.6 minute read
                    Home and GardenDIY and CraftsTechnology
                    A close-up image of a frustrated homeowner examining a non-functional air conditioning unit on a hot summer day.
                    Published January 19, 2025
                    Last Updated May 30, 2025
                    contributorcontributorcontributor
                    2.6 minute read

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