A homeowner recently moved into a house with a Hunter EC-400 irrigation controller installed around 2004. When attempting to set the current day and time, the controller only allows hour adjustments—pressing the arrow button does not advance to minutes or AM/PM selection. The user suspects the controller may be defective.
If a button press isn't registered, try resetting the controller before considering replacement. Power cycle the unit by removing the 9‑volt backup battery, disconnecting AC power for about one minute, then reconnecting power with the battery still out. If the display and buttons function normally afterward, the issue may be resolved. If not, the controller likely needs replacement. Hunter’s technical support (760‑591‑7383) is highly recommended for further assistance.
Key Takeaway: A simple reset often restores full functionality. If the problem persists after a reset, the controller’s keypad or internal circuitry may be worn out after many years of service.
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