Please unplug your machine from the electrical outlet before trying the following:
- Failure to properly maintain the filters could result in damage to the motor. Check the inner and outer circular filters and the post-motor filter for debris. Also check the upper-tank louvers. These can be removed and rinsed clean.
- A clogged hose may also cause the vacuum to sound abnormal. To clear the hose, remove this completely from the back of the machine. Using a broomstick handle, push any dirt or debris through the hose. Remove the screw which attaches the lower hose. Straighten this section of hose and remove any debris by using a broomstick handle.
If your machine continues to be excessively loud, please take your machine to a local BISSELL Authorized Service Center. To locate your nearest BISSELL Authorized Service Center, go to the BISSELL Homepage at: http://www.bissell.com. Select Customer Support at the top of the page and enter your zip code to perform your search in the zip code. You can also locate a Service Center by phone, 24 hours a day, by calling 1-800-263-2535 and choosing option #1.