Why Your Air Compressor Won’t Stop Running And What To Do About It

If your air compressor seems to be working non-stop, it can be a sign of an underlying issue. Understanding the reasons behind this persistent running can help you address the problem and restore your compressor to optimal performance. In this comprehensive guide, we’ll delve into the potential causes and provide practical solutions to get your air compressor running smoothly again.

Common Causes for Constant Air Compressor Operation

1. Air Leaks:
Air leaks in the system, such as from hoses, fittings, or seals, can cause the compressor to run continuously to compensate for the lost air pressure. Inspect the entire system thoroughly for any leaks and repair or replace damaged components.

2. Oversized Compressor:
An air compressor that is too large for the application can lead to constant running. The compressor may be generating more air than the demand requires, resulting in over-pressurization and unnecessary operation. Consider downsizing the compressor to match the actual air consumption needs.

3. Faulty Pressure Switch:
The pressure switch is responsible for turning the compressor on and off based on the air pressure in the tank. A malfunctioning pressure switch can cause the compressor to run continuously, even when the desired pressure has been reached. Replace the faulty pressure switch to resolve the issue.

4. Worn Pistons or Rings:
Over time, the pistons and rings in the compressor can wear out, leading to reduced compression efficiency. This can result in the compressor running constantly to try to maintain the necessary pressure. Inspect and replace worn pistons or rings to restore proper compression.

5. Clogged Air Filter:
A clogged air filter restricts airflow to the compressor, causing it to work harder and run longer to achieve the desired pressure. Regularly clean or replace the air filter to ensure adequate airflow.

6. Excessive Moisture:
Excessive moisture in the compressed air system can cause corrosion and damage to components. This can lead to increased friction and reduced compression efficiency, resulting in the compressor running continuously to compensate. Drain the condensate from the tank regularly and consider installing a moisture separator to remove moisture from the air.

7. Faulty Unloader Valve:
The unloader valve is designed to release pressure from the compressor head when the desired pressure is reached. A faulty unloader valve can prevent the pressure from being released, causing the compressor to run continuously. Replace the malfunctioning unloader valve to restore proper operation.

Troubleshooting and Solutions

1. Check for Leaks:
Use a soapy water solution to spray over potential leak points. Bubbles indicate a leak. Tighten loose connections and replace damaged hoses or seals.

2. Downsize the Compressor:
Calculate the actual air consumption requirements and select a compressor with a capacity that meets those needs.

3. Replace the Pressure Switch:
Locate the pressure switch and replace it with a new one that is compatible with your compressor.

4. Inspect Pistons and Rings:
Disassemble the compressor and inspect the pistons and rings for wear or damage. Replace any worn components.

5. Clean or Replace the Air Filter:
Remove the air filter and clean it thoroughly. If it is excessively dirty, replace it with a new one.

6. Drain Condensate and Install Moisture Separator:
Drain the condensate from the air tank regularly. Install a moisture separator to remove moisture from the compressed air.

7. Replace Unloader Valve:
Locate the unloader valve and replace it with a new one to ensure proper pressure release.

Ending the Constant Running Cycle

By addressing the underlying causes and implementing the appropriate solutions, you can put an end to your air compressor’s incessant operation. Regular maintenance, prompt repairs, and attention to detail will help keep your compressor running smoothly and efficiently for years to come.

FAQ

Q1. Why does my air compressor run for a short time and then stop?
A1. This could indicate a problem with the pressure switch or a leak in the system. Check the pressure switch and inspect for leaks.

Q2. What is the ideal air pressure for most air compressors?
A2. The ideal air pressure depends on the specific application. Consult the manufacturer’s specifications for the recommended air pressure range.

Q3. How often should I drain the condensate from my air compressor?
A3. Drain the condensate regularly, especially in humid environments. The frequency may vary depending on the compressor’s usage and the amount of moisture present in the air.