The answer to 'why is my sprinkler system' is that there can be several common causes for issues with a sprinkler system, including broken or clogged sprinkler heads, leaks in the pipes, problems with the controller or timer, and issues with the water supply. Symptoms may include uneven watering, dry spots, water pooling, or the system not turning on at all.
Some solutions homeowners can try themselves include checking for and fixing broken or clogged sprinkler heads, ensuring the controller is properly programmed, and checking the main water supply valve. However, more complex issues like leaks in the underground pipes or problems with the pump or wiring may require the expertise of a professional sprinkler repair technician.