The part(s) or condition(s) listed below for the symptom Vacuum cleaner belt keeps breaking are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
If too much hair, string, or lint is caught in the brushroll, the brushroll can get stuck. If the brushroll is stuck, it will put too much strain on the belt and may cause the belt to break. Remove the brushroll and clean out any debris from the bearings. After replacing the brushroll, make sure that it turns freely.