HI, it's Jim from Crucial Vacuum!
If your Shark Navigator Lift-Away Vacuum is making a loud noise while it's on then there's definitely a clog somewhere. Here' s a few places you should check prior to plugging in the vacuum and turning it on.
The first place to check would be the brush roll and belt. If you notice visible debris, like strands of hairs, or long carpet fibers this could be catching on the brush roll and causing it not to turn fully. Be sure to clear this debris from the brush roll and manually spin the brush roll a few times after you do so to help unearth and any other clogs. This may be the reason for the noise and its crucial that this part of your vacuum is clog free.
Another part of your vacuum to check would be your hose. Detach the hose and stretch it out as much as you can to see if any debris or clumps of dust are stuck inside. Using a broom handle can help if you see a clog, but it won't come out after you've stretched out the hose.
Another big factor would be a dirty filter in your vacuum. Most manufacturers recommend you change your filter on average every 3-6 months. However, it is recommended to change your filter even earlier depending on usage and allergy care. The cleaner your filters the less debris will get stuck in your vacuum, causing less clogs and overall less odd noises while vacuuming.
You can purchase a wide variety of high quality Shark replacement parts for your Shark vacuum direct from Crucial Vacuum with free shipping and an exclusive 10% coupon for Fixya.com readers, use code: FIXYA10
I hope this was helpful. If you would like further assistance, please feel free to give us a call at 877.750.9239. We have helpful and friendly customer care representatives on the line ready to assist you.
Crucial Vacuum Customer Care