Solutions may help you:
1. If the timer dial is at OFF position, turn the dial to ON position.
2. If the battery power is low, replace with new batteries if low battery indicator flashes.
3. If the hose faucet is off, turn on the faucet.
4. If the diaphragm inside the built-in solenoid valve is stuck, follow the steps to reset the solenoid valve: Step 1: Turn the dial to OFF. Step 2: Simultaneously press "OK" and "-" buttons for 3 seconds, the timer enters into reset mode. Step 3: During reset mode, the valve open and close repeatedly. Step 4: Once water flows through smoothly, simultaneously press "OK" and "-" buttons for 3 seconds again, then the timer will cancel reset mode.