Comprehensive Troubleshooting Guide for Deep Well Submersible Pumps

Deep well submersible pumps are vital for maintaining a reliable water supply in various applications, from residential water systems to large-scale agricultural and industrial operations. However, like any mechanical system, they can encounter issues that disrupt their functionality. This troubleshooting guide, authored from the perspective of a technical expert, provides step-by-step procedures to diagnose and resolve common problems with deep well submersible pumps. Targeted at water management professionals, this guide aims to ensure your pumps operate efficiently and reliably.

Common Issues and Troubleshooting Steps

1. Low Water Flow

Potential Causes:

  • Sediment Buildup: Sediment and debris can clog the pump intake or the well screen, restricting water flow.
  • Impeller Wear: Worn or damaged impellers can reduce the pump’s efficiency and water output.
  • Pipe Leaks: Leaks in the discharge pipe can cause a drop in water pressure and flow rate.

Troubleshooting Steps:

  1. Inspect the Intake Screen: Check the pump intake screen for any sediment or debris buildup. Clean or replace the screen if necessary.
  2. Examine the Impellers: Remove the pump from the well and inspect the impellers for wear or damage. Replace any worn or damaged impellers.
  3. Check for Leaks: Inspect the discharge pipe and connections for leaks. Repair or replace any damaged sections of the pipe.

For detailed guidance on dealing with low water flow, refer to our section on Low Water Flow Troubleshooting.

2. Pump Not Starting

Potential Causes:

  • Electrical Issues: Faulty wiring, blown fuses, or tripped circuit breakers can prevent the pump from starting.
  • Motor Problems: Motor issues such as overheating or bearing wear can cause the pump to fail to start.
  • Control System Malfunctions: Problems with the pressure switch or control box can prevent the pump from operating.

Troubleshooting Steps:

  1. Check Electrical Connections: Inspect all electrical connections, including the wiring, fuses, and circuit breakers. Ensure all connections are secure and replace any blown fuses or reset tripped breakers.
  2. Test the Motor: Use a multimeter to test the motor for continuity and resistance. If the motor is overheating or the bearings are worn, consult a professional for repair or replacement.
  3. Inspect the Control System: Check the pressure switch and control box for proper operation. Replace any faulty components.

For more detailed procedures, visit our Pump Not Starting Troubleshooting section.

3. Pump Running Continuously

Potential Causes:

  • Pressure Switch Issues: A malfunctioning pressure switch can cause the pump to run continuously, leading to excessive wear.
  • Leaks in the System: Leaks in the plumbing system can cause a drop in pressure, leading the pump to run continuously to maintain pressure.
  • Clogged Filters: Clogged filters can restrict water flow, causing the pump to run continuously to try to meet demand.

Troubleshooting Steps:

  1. Inspect the Pressure Switch: Check the pressure switch for proper operation and adjust or replace it if necessary.
  2. Check for System Leaks: Inspect the entire plumbing system for leaks and repair any found.
  3. Clean or Replace Filters: Check and clean or replace any clogged filters in the system.

For further instructions, see our Pump Running Continuously Troubleshooting section.

4. Unusual Noises or Vibrations

Potential Causes:

  • Loose Components: Loose bolts or fittings can cause vibrations and noise.
  • Bearing Wear: Worn bearings can lead to increased friction and noise.
  • Impeller Imbalance: Imbalanced impellers can cause vibrations and noise during operation.

Troubleshooting Steps:

  1. Tighten Loose Components: Inspect the pump and tighten any loose bolts or fittings.
  2. Check Bearings: Inspect the bearings for wear and replace them if necessary.
  3. Balance the Impellers: Remove the pump and check the impellers for balance. Replace or adjust any imbalanced impellers.

For detailed guidance, refer to our Unusual Noises or Vibrations Troubleshooting section.

5. Electrical Issues

Potential Causes:

  • Wiring Problems: Damaged or corroded wiring can cause electrical issues.
  • Control Box Malfunctions: Issues with the control box can disrupt the pump’s operation.
  • Voltage Fluctuations: Inconsistent voltage supply can affect the pump’s performance.

Troubleshooting Steps:

  1. Inspect Wiring: Check all wiring for damage or corrosion and replace as necessary.
  2. Test the Control Box: Inspect the control box and replace any faulty components.
  3. Check Voltage Supply: Ensure the pump is receiving the correct voltage. If there are fluctuations, consult an electrician to address the issue.

For more detailed procedures, see our Electrical Issues Troubleshooting section.

Preventive Maintenance Tips

  1. Regular Inspections: Conduct monthly inspections to identify and address potential issues before they become major problems.
  2. Routine Cleaning: Clean the pump and well regularly to prevent sediment buildup and ensure efficient operation.
  3. Professional Servicing: Schedule regular professional maintenance to ensure all components are in optimal condition and functioning correctly.

For comprehensive preventive maintenance tips, visit our Preventive Maintenance Tips section.


Effective troubleshooting and maintenance are essential for the reliable operation of deep well submersible pumps. By following the step-by-step procedures outlined in this guide, water management professionals can diagnose and resolve common issues, ensuring their water pumps operate efficiently and reliably. Regular maintenance and timely repairs not only extend the lifespan of the pumps but also ensure a consistent and dependable water supply.

For more detailed information and troubleshooting procedures, refer to our sections on Low Water Flow Troubleshooting, Pump Not Starting Troubleshooting, and Electrical Issues Troubleshooting.