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Brandon CarlsonAug 8, 2025
Why is my Sullair 1509e Air Compressor not building full discharge pressure?
- MmwarnerAug 8, 2025
If your Sullair Air Compressor isn't building full discharge pressure, consider these potential causes: The air demand might be too great, so check service lines for leaks or open valves. The air filter might be dirty, so inspect the filter indicator and replace the element if needed. A plugged inlet valve bleed orifice could also be the problem, so ensure the control line bleed orifice is not blocked. Additionally, the pressure regulator might be out of adjustment or defective, so adjust it or replace the diaphragm if necessary. Finally, a defective unload solenoid valve could be the issue, so check that it closes when energized, and replace it if defective.
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