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Old 10-10-2013, 08:37 PM   #1
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Problem with automatic lawn sprinklers

I live in Florida and am having a problem with my Rainbird automatic lawn sprinklers.

I haven't used the lawn sprinklers since last year do to all the summer rain we get here. Last winter all 7 zones worked perfectly.

Now zone 3 and 4 are not working. When they are supposed to come on, all I hear is a clicking / thumping sound about once each 2 seconds from the electric solenoid valves for both these zones ... but no water is coming out of the sprinkler heads for zone 3 and 4.

All I can think is that the little electric solenoid valve (one for each of the 2 zones) must be bad.

It's obviously getting power or these 2 valve would not be making that continual knocking sound.

Do I need to go buy new solonoids for these 2 zones? (again, all 7 zones worked perfectly last year).



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Old 10-10-2013, 08:52 PM   #2
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Sometimes it can be caused by a simple clog or buildup of sediment, which you can repair easily. Just unscrew the head and clean out any clogs with your fingers or a small tool.

You can check for a current at the zone wire terminal where the failure is located with a mm if you want to confirm it, then reset the controller. Additionally, you can check the electricity flow from the controller. As you have already stated, you may need to replace the controller or the valve solenoid.


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Old 10-10-2013, 10:02 PM   #3
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Depending on your valves. Try opening the valve manually. On the rainbirds it's a matter of turning the solenoid.
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Old 10-13-2013, 07:06 PM   #4
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Thanks for the suggestions.

I just went to Home Depot and bought a replacement diaphragm and solenoid for the valve ... works perfectly now!

I first took the valve apart and cleaned it out real good, but that didn't help.
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