It is almost inevitable that your feeder line will break at some point. But there are certain steps you can take to minimize the number of times this happens. The most common causes for trimmer line breaks are:
Contact with a foreign object such as a sprinkler head or brick - This can be avoided by staying alert while you work. Keep an eye out for what’s coming, and don’t move the weed trimmer into areas where loose debris is visible.
Using the wrong replacement parts - While it’s not the Space Shuttle, a weed trimmer is still a piece of precision machinery. If you serviced the trimmer yourself and used non-approved parts at any time, this can lead to line failures.
Incorrect storage - If the device is not stored properly, it can lead to corrosion inside the head of the trimmer, which can interfere with proper functioning and cause the trimmer line to break.