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Orbit Green Thumb Timer (Model 27155) Not Opening Valve

Timer Has Power But Valve Won't Open

The battery-powered Orbit 27155 shows correct time and programming, but the internal valve doesn't open to allow water flow.

Verify Programming Settings

Interval Dial (left): Set to desired frequency (Daily, 2nd Day, 3rd Day, 4th Day).
Set Start Dial: Set the exact time of day for watering to begin.
Duration Dial (right): Set run time (10, 20, 30, 40, 55 min, or "ON" for manual).

All three must align. Example: Interval = Daily, Start = 6:00 AM, Duration = 20 min.

If Settings Are Correct

The timer's internal solenoid valve may be defective. These units are inexpensive; if troubleshooting fails, return it for exchange. No field-repairable parts inside.

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