Do-It-Yourself Irrigation Inc.
Do-It-Yourself Irrigation Inc is your best source for Lawn Sprinklers, Lawn Irrigation Supplies, Irrigation Parts, Landscape Lighting, Well Pumps, Wire, Backflow Prevention, Pond and Lake Fountains as well as Irrigation and Landscape Lighting Design. and Instruction.

Troubleshooting Lawn Sprinklers and Irrigation Systems

Troubleshooting Lawn Sprinklers and Irrigation Systems is easy if you follow these steps.

Problem A: All zones will not work electrically, but will work manually.

Step1. Is rain sensor activated?

Yes- By-pass sensor or wait until sufficient evaporation time

No-  Proceed to step #2


Step 2. Is there 110 VAC to controller? (keep in mind the battery back-up will  power the display).

No- Check the C/B or Ground fault outlet associated with that outlet and reset.

Yes- Proceed to step #3


Step 3. Is there 24VAC at outlet of transformer?

No- Replace transformer

Yes- Proceed to step#4


Step 4. Is there 24VAC at each zone terminal when zone is turned on?

No- Reset controller, if no help, replace controller.

Yes Proceed to step #5


Step 5. Check for bad connection or broken wire on the common or ground wire between electronic controller and valve that was wired first from the controller.

Problem B: One zone will not work electrically, all other zones operate normally.

Step 1. Check for 24VAC at the zone wire terminal with the failure. (While zone is programmed or is operating is there 24VAC at terminal?)

No- Reset the controller and check again. Still not operating, faulty

Yes- Proceed to step #2


Step 2. Check for 24VAC at the zone not operating. Remove wire nuts and check for 24VAC on wires coming from the controller. Is there 24VAC.

No- Check for broken or damaged control wire between controller and valve.

Yes- Replace solenoid on valve.


Problem C: Two zones will not work electrically, remaining zones work normally.

Step 1. Refer to Problem B for diagnostic procedures. Note: If problem zones are the two furthest zone valves from the controller, the most probable cause would be a broken ground wire or a bad connection between the last working zone valve and the first failed valve. (Example: You ran the ground wire from the controller to zone 2 then to zone 1, then zone 4, then zone 3, and then zone 5 and 6. Zone 5 and 6 are failed.) Look for the problem connection or broken ground wire between zone 3 and zone 5.(2-1-4-3 problem 5-6)

Problem D: Zone valve will not close, zone continually runs, even when the controller is unplugged.

Step 1. Remove solenoid on zone valve and check plunger. Check and see if
plunger is stuck in retracted position. Is the plunger retracted?

Yes- free plunger and clean, make sure plunger has smooth operation. (Be sure to turn water off prior to removing solenoid.)

No- proceed to step #2.


Step 2. Remove screw or bolts that hold the upper half of valve to the bottom half. Separate the upper half, ("bonnet"), from the lower half. ("valve body") Remove rubber diaphragm and remove any debris from valve body. If you are unable to visually find any debris turn water back on momentarily and flush valve. ( during flushing process do not allow debris to enter back into valve).

Problem E: Spray head pops up but does not spray.

Step 1. Unscrew nozzle on top of turret, remove finger filter and clean filter and nozzle.

Problem F: One Gear driven head in a zone does not spray and will not pop up.

Step 1. Unscrew head from head body. Inspect and remove any debris from filter. If filter is not clogged proceed to step two.

Step 2. Dig area around head to gain access to barb fitting associated to
failed head that is connected to PVC fitting. Unscrew barb and clean debris
out of barb fitting.

Troubleshooting Lawn Sprinklers and Irrigation Systems

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