Why is the little rectangle on the side sucking in so much air and causing it not to work?

Just experienced this "rectangle sucking tons of air" problem with my UV850 Shark - turns out there was not one but two blockages: one in the hose and one in the very base of vacuum (which necessitated using a screwdriver to open the two grey screws on the bottom). Once I got these cleared the vacuum was back to normal.

What is the difference between Shark NV 352 and the NV 356

The 352 has a 25 foot cord, the 356 (professional) is 30', the hard floor tools are different. The 356 has a microfiber 'dust pad' that goes over the hardwood floor attachment. The 352's hard floor attachment has a 'V' shape to funnel debris no pad, but it does have a duster attachment both available to purchase separately. The dust cup on the 356 is larger and the overall machine is 2 lbs heavier then the 352. 356 also comes with a bag for the tools where my 352 did not. The other tools all appear to be the same on both models. They both run the same amps and can be converted into canister mode as well, but are aesthetically different.

How do you clean the filter?

There is a HEPA filter in front of the vacuum, you lift the door from the bottom and you can take it out and wash it. and then you lift the canister out from the base ( like you're emptying the canister of dirt.) You will find 2 foam filters there. lift them both out and wash those too. Just dont throw in washing machine or dishwasher. I use dish detergent and wash them off in the sink. Just make sure they are completely dry before putting them back on the vacuum. After a dozen or so washings they will break down ( you will know this ) extra filters can be purchased on EBay or Amazon or other websites. I usually clean the foam filters when they are a very dark brown or gray color,then i also wash the HEPA filter also. Good luck! Here a PDF file that tells you all about the shark vacuum .Page 13 & 14 tell you how to clean the filters . http://prcind.com/user_manuals/NV351-FS.pdf

ASIN	B004Q4DRJW
Amperage	10 Amps
Best Sellers Rank	#65,652 in Kitchen ( See Top 100 in Kitchen ) #383 in Handheld Vacuums
Brand	Shark
Brand Name	Shark
Capacity	1.1 Quarts
Color	purple
Control Method	Touch
Controller Type	Hand Control
Customer Reviews	4.4 out of 5 stars 27,802 Reviews
Filter Type	HEPA
Filter type	HEPA
Form Factor	Upright
Global Trade Identification Number	00622356530828, 10622356530825
Included Components	Crevice Tool, Upholstery tool
Indoor Outdoor Usage	Indoor
Is Electric	Yes
Is Product Cordless	No
Item Type Name	with Wide Upholstery and Crevice Tool, Lavender
Item Weight	5.67 kg
Item height	45.5 inches
Manufacturer	SharkNinja
Model Name	Navigator Upright Vacuum Cleaner
Model Number	NV352
Noise Level	80 Decibels
Number of Handles	1
Number of Items	1
Other Special Features of the Product	Swivel Steering
Portable	Yes
Power Source	Corded Electric
Power source	Corded Electric
Recommended Uses For Product	Cleaning
Series Number	352
Special features	Swivel Steering
Style Name	modern
Surface Recommendation	Carpet
Surface recommendation	Carpet
UPC	622356530828
Voltage	100120 Volts
Wattage	1200 watts

Shark NV352 Navigator Lift Away Upright Vacuum with Wide Upholstery and Crevice Tools, Lavender

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