Chosen Solution

My NV642 has lost suction and makes a loud rattling noise. The upper canister part is still working. What is the issue?

A vacuum cleaner may lose suction for many reasons, but in most of the cased, loud noise is created for severe clog at the hose. It is also a reason for less suction. That’s why I am primarily suspecting that maybe there is a clog. You should try to fix that. To do so, you can follow the steps mentioned in the refered website. https://vacuumsadvisor.com/shark-vacuum-