The answer to 'irrigation system turning brown' is that your lawn's irrigation system may be malfunctioning, leading to uneven water distribution and brown, dying grass. Common causes include broken sprinkler heads, clogged pipes, or issues with the irrigation timer or valves. Symptoms include patchy brown spots, uneven watering, and grass that feels dry and crunchy to the touch.
In many cases, the solution can be a simple DIY fix, such as replacing a broken sprinkler head or adjusting the irrigation timer. However, if the issue is more complex, such as a problem with the main irrigation lines or the controller, it's best to call in a professional landscaping or irrigation specialist to diagnose and repair the system.