{"id":6867,"date":"2026-03-31T09:39:52","date_gmt":"2026-03-31T09:39:52","guid":{"rendered":"https:\/\/cool-panini.185-226-232-135.plesk.page\/blog\/sin-categorizar\/how-to-tell-if-your-air-compressor-is-damaged-symptoms-and-diagnosis\/"},"modified":"2026-04-27T09:46:49","modified_gmt":"2026-04-27T09:46:49","slug":"how-to-tell-if-your-air-compressor-is-damaged-symptoms-and-diagnosis","status":"publish","type":"post","link":"https:\/\/frosty-sammet.109-228-56-25.plesk.page\/en\/blog\/air-compressors\/how-to-tell-if-your-air-compressor-is-damaged-symptoms-and-diagnosis\/","title":{"rendered":"How to tell if your air compressor is damaged: symptoms and diagnosis"},"content":{"rendered":"\n

The clearest signs that an air compressor has a problem are: it won\u2019t start or struggles to start, it doesn\u2019t reach its usual working pressure, it overheats, it makes noises it didn\u2019t make before, it uses more oil than normal, or the air it delivers contains water or oil residues. Any of these symptoms deserves attention before a minor issue turns into a major breakdown. <\/p>\n\n

This article helps you identify what may be happening based on what you observe, without needing to be a technician. Each symptom has common causes and specific steps you can check before calling technical service. <\/p>\n\n

The compressor won\u2019t start or has difficulty starting<\/h2>\n\n

This is one of the most frequent faults, especially in piston compressors, and it almost always has an identifiable electrical or mechanical cause.<\/p>\n\n

What to check first:<\/strong><\/p>\n\n

The thermal overload relay<\/strong> is the first suspect. This protective device trips when the motor overheats or receives an electrical overload. In most professional piston compressors<\/a> it is accessible under the motor cover and has a reset button, usually red or black. If you press it and the compressor starts again, the issue may have been temporary. If it keeps tripping, there is an underlying cause that needs to be addressed. <\/p>\n\n

Other common factors<\/strong>: using extension leads with too small a cable cross-section or excessive length, which do not supply the required voltage at start-up; a blown fuse or a tripped RCD in the electrical panel; or a motor with worn bearings that drags when trying to turn.<\/p>\n\n

On compressors that have not been used for a long time, the piston can also stick due to dried oil residue. In that case, manually turning the compressor flywheel before starting usually solves the problem. <\/p>\n\n

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The compressor does not reach working pressure<\/h2>\n\n

If the compressor starts and runs but never reaches the pressure it should, the problem is usually an internal or external leak, or wear in compression components. Most common causes: <\/p>\n\n