Blender repair keeps your smoothies flowing. Container leaks come from the blade assembly gasket—replace it. The blade unit unscrews from the container bottom. Motor overheating? Clean vents and check for jams. Vitamix, Ninja, Blendtec, and NutriBullet have different designs. Always unplug before servicing. The base motor rarely fails—container and blade issues are more common. Use the correct replacement gasket. Do not overtighten the blade assembly. Run a test blend with water before heavy use.