Robot Vacuum Makes Loud or Unusual Noises

Small objects such as pebbles, coins, or toy parts often get caught in the brush. Turn off the robot, flip it over, remove the brush cover, and inspect the main brush. Remove anything that doesn’t belong there and check whether the brush turns easily.

Tangled hair can cause squeaking or scraping noises. Remove the brush and carefully cut away the hair with scissors, especially at the axle ends. Also clean the brush bearings in the housing.

If you turn the brush in your hands and it feels rough or loose, the bearings are probably worn. Some models have replaceable bearings; on others, the entire brush needs to be replaced.

Dust in the motor or fan can cause uneven operation. If possible, open the housing and carefully blow compressed air into the motor area. Caution: Hold the fan in place so it doesn’t spin freely, as this can damage it.

Rattling can be caused by loose screws. Gently shake the robot and listen for anything moving inside. Tighten any visible screws if necessary.

A worn or slipped belt can cause knocking noises. Open the housing, check the belt, and replace it if it is cracked or frayed.

If a side brush is bent or loose, it may scrape along the floor. Carefully straighten it or replace it if it is badly warped.

A wheel bearing can scrape if it is not seated correctly. Check all wheels, clean them, and make sure they can spin freely.

If the noise comes from the motor and gets louder over time, the motor is probably worn. In this case, only a more involved repair or replacement will help. With older models, replacing the robot often makes more sense.