* Air spring (bellows): This is the most common culprit. Small tears or punctures in the air springs themselves allow air to escape. These are often difficult to spot visually, requiring careful inspection.
* Air lines/hoses: Cracks, holes, or loose connections in the air lines that run between the compressor, valves, and air springs can cause leaks. These are relatively easier to find and fix.
* Air suspension struts: These can leak internally, causing the system to lose pressure.
* Valve block: The valve block controls the air flow to each corner of the vehicle. A leak within this component can also lead to constant pump operation. This is less common but more complex to repair.
* Fittings: Leaks can develop at the connections between different parts of the system.
Less common causes:
* Faulty compressor pressure switch: This switch tells the compressor when to turn on and off. If it's malfunctioning, it might keep the compressor running continuously.
* Worn compressor seals: While less likely to cause *constant* running, worn compressor seals can lead to inefficiency and increased run time.
Troubleshooting:
To diagnose the problem, you'll need to systematically check for leaks. This usually involves:
1. Visual inspection: Carefully examine all visible air lines, connections, and the air springs for any signs of damage. Use soapy water to help locate small leaks – bubbles will form where air is escaping.
2. Pressure test: If you can't find a leak visually, a pressure test is needed. This involves pressurizing the system and monitoring the pressure drop over time. A slow pressure drop indicates a leak somewhere.
3. Professional diagnosis: If you're not comfortable working on your car's suspension system, take it to a qualified mechanic. They have the tools and expertise to diagnose and repair air suspension leaks efficiently.
Ignoring a constantly running air pump will eventually lead to compressor failure and potentially damage to other components of the suspension system. Addressing the leak is crucial.
