how do i use the pulse button on my kitchenaid k400 blender? it doesn't seem to do anything.

You need to press and hold the button while also turning the dial. Let's walk through it.

1. Make sure your ingredients are in the jar and the lid and lid center cap are secured.
2. Place the jar on the base with the handle facing the control dial.
3. Press and hold the pulse button.
4. While holding the button, turn the control dial from the (O) position to the (P) position. Hold it there for as long as you want the pulse to run.
5. When you're done, release the dial. It will return to (O) and stop.

If that didn't work: Check that the blender is plugged into a proper outlet. Also, ensure you're not in a preset program cycle—the pulse function works independently.

Heads up: The pulse function is perfect for breaking up chunky frozen items before you blend on high. It gets things smoother faster.