If you're unsure whether you're replacing your Whirlpool microwave parts correctly, here are a few things to look out for.  First, make sure that the new parts are compatible with your model of microwave. Second, check to see if the new parts fit snugly and securely in place. Finally, test the latest pieces by running the microwave through a cycle to see if they're functioning correctly.  If everything looks and works well, you've successfully replaced your Whirlpool microwave parts.