Try these simple checks before calling Horizon for service. We encourage you to work safely and, for your protection, we recommend that you wear safety glasses and gloves.

If the timer fails to start:

• Check to see that the timer has power.
• Check the timer's fuse or circuit breaker.
• Unplug the timer, remove the batteries, wait 10 seconds, reinstall or replace the batteries, plug in the timer
• back in and reprogram, following the timer instructions.
• Your timer's instruction manual should provide other troubleshooting ideas suitable to your model.
• Follow all safety instructions in your owner's manual.

If the backflow device leaks and/or water is leaking into the house:

• Shut off the main water valve until the device can be repaired or replaced.

If a zone fails to turn on:

Check the wire connections at the valve and at the clock. Repair if necessary.

If a valve sticks open and will not close:

• Turn off main water supply valve at the backflow device or in the basement.
• Loosen the screws and remove the top cover of the sticking valve.
• Remove the rubber diaphragm.
• Look for stones or debris at the bottom of the valve.
• Inspect the rubber diaphragm for tears or embedded stones. Replace diaphragm if necessary.
• Reassemble the valve, replace the cover and test by working the zone at the timer.
• If the valve continues to fail, replace it.

If you see large amounts of water, soggy areas or flooding:

Check for the following -

• Watering schedule (timer settings) - it may be as simple as shortening the watering time.
• Broken heads
• Stuck zone valves
• Broken main or lateral lines
• Repair or replace parts necessary.

If timer operates but no water comes out:

• Check the main shut-off valves to be sure they are open
• Test the rain sensor and override if necessary.

If you are still having problems, please contact Horizon or your NJ State licensed irrigation professional.

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