6 Months Old Vacuum Cleaner Started Hissing
My vacuum cleaner starts hissing after a short while as it heats up after start of cleaning routine but then in the middle of my cleaning routine after powering it ON, it takes almost a second to start hissing again. Maybe ref="this has to do with heating and deformation of certain part? Below you will find link to YouTube of a video I shot.
Here is a link that might be useful: Vacuum Cleaner Hissing