Why is my sprinkler system not turning on?

The most common cause of individual sprinklers not coming on is blockage. The thin spray opening of a sprinkler head easily becomes clogged with dirt and debris. Inspect malfunctioning sprinkler heads while the water supply is off, and clear blockages with a thin, straight-edged tool such as a screwdriver.Click to see full answer. Moreover, why won’t my sprinkler system come on?Go to one of the irrigation valves and turn the solenoid 1/4 to 1/2 a turn counter-clockwise. If the valve opens and sprinklers turn on, your valve is working and you’ll need to check the controller and field wiring. If the valve did not turn on any of the sprinklers, the water to the valves is still off.Beside above, how do I know if my sprinkler solenoid is bad? If your solenoid is bad, the water pressure in the sprinkler chamber will not be changed and the valve will fail to open. Turn off the water supply. Open the solenoid housing and inspect the plunger. Reinsert the solenoid plunger into the housing. Turn on the water and test the sprinkler. People also ask, why is one sprinkler zone not working? A lawn sprinkler system is usually divided into two or more zones that water independently of each other. Each zone consists of several sprinkler heads controlled by a valve that is electrically activated. If a single zone is not working, the problem is usually an electrical issue or a defective controller or solenoid.How do you reset a sprinkler system? How to Reset a Sprinkler System Turn the control dial to the “off” position. Press the “next” button to access the clear-memory feature. Press and hold the “off” button until the display stops blinking. Turn the control dial to the “run” position. Press and hold down the “minus” arrow and “prog” buttons simultaneously.