Do It Yourself Rain Sensor Checkup
Under Florida Law (Section 373.62 F.S.), irrigation systems are required to
be outfitted with a working rain shut-off device or other technology to inhibit
or interrupt operation of the irrigation system during periods of sufficient
To ensure proper
operation, sensors should be checked at least once a year. Information about
types and installation of rain sensing devices is available from the
University of Florida.
These instructions are specifically for testing a cork-disc rain sensor. If you
have another type, please check with the manufacturer for specific instructions
about testing it.
For a cork-disc sensor:
Locate the rain sensor for your irrigation system. Typically, it
will be located on the roofline or atop a fence. Check to make sure
that the top of the sensor is not obstructed by eaves, treetops or other
obstructions that keep rain from reaching the sensor.
Turn on the time clock for the zone nearest the sensor.
Press and hold down the button on top of the sensor. The zone
should shut off. (If your rain sensor does not have a button on top,
it is not a cork-disc sensor.)
Release the button and the zone should come back on. If it does,
the sensor is operating properly.
If the system does not shut off or come back on, check for wiring
problems. The device may have to be repaired or replaced. Check
the instruction manual or manufacturer's Web site for additional information
about your specific brand and model rain sensor.
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