A number of problems with KitchenAid blenders relate to the blender failing to operate or stopping while it's blending. Other problems stem from blending ingredients that have specific characteristics. Knowledge of the quirks related to ingredients you use helps in troubleshooting a KitchenAid blender. Working within the limits of the blender will also maintain longevity.
Make sure the blender is plugged into a working outlet. If the blender does not operate at all and the circuit is controlled by a ground-fault circuit interrupter, press the "Reset" button on the interrupter. Go to the service panel and check the circuit breaker or fuse for a standard outlet.
Turn the blender off to reset it and divide the jar's contents into smaller batches, if it has switched off unexpectedly. The blender may have become overloaded. Try adding some liquid to reduce the load on the motor.
Unplug the blender. Free the blender's blades by breaking up the contents at the bottom of the jar if the blades become jammed.
Reduce the size of food chunks that you put into the blender. For example, smaller ice cubes can be chopped faster than larger ones. If crushing ice takes a long time, use smaller cubes. Grate cheese by cutting it into ½ to 1-inch pieces first to avoid clogging the blender.
Press the "Stir" button to start blending if you find the "Blend" setting doesn't combine them well enough. When the ingredients are combined, change back to "Blend."
Check your blender's instruction manual to find out what maximum amounts of food you can add. Many blenders can only take one cup at a time. Kitchenaid's bigger blenders like the KitchenAid KSB550, KSB560, KSB570 and KSB580 blenders can handle 2 to 3 cups at a time.