7. Why does my compressor run constantly?
If your air compressor is constantly running without shutting off, this could be a sign of a problem—and it is probably costing you a bundle. It is very rare to see system compressors exactly match the facility demand, requiring the need for constant full-load operation. The most obvious thing you should check for is leaks or a system machine malfunction that could be consuming excess air, but failing that here are some things to consider.
There are two basic types of compressors commonly found in shops and manufacturing plants: reciprocating and screw type. These compressor types have different characteristics, so depending on what type you have, the answer varies.