1. If the well contains a certain amount of sand and gravel, it may be due to wear of the impeller components ..

2. If it is a three-phase pump, it may reverse. Fix one phase wire and swap the wires of the other two phases. Observe the water output situation. If the water output increases...

, it indicates that the direction of rotation is correct.

3. If it is single-phase, it may also be due to a decrease in capacitor capacity, a decrease in motor speed, and a decrease in flow rate.

4. If the current significantly increases, it may cause a local short circuit in the motor stator winding or water ingress into the motor, resulting in a decrease in speed and flow rate.