1. Is the forward and reverse rotation of the motor correct
If not, water cannot be pumped up.
2. Whether the groundwater level drops by pumping water from underground
3. Is the upper opening of the pump blocked
If it's blocked, water won't come in
4. Is there any air leakage at the suction inlet of the water pump
If there is a leak, there will be no water supply
5. Is the voltage too low
If the voltage is too low, the water pump will not produce water or the water output will be insufficient