Question about Campbell Hausfeld 26 - Gallon Air Compressor

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Compressor will not turn off

When the pressure reaches 125 it will not turn off.but there is a small valve with a small black hose in the top of it and you can push up underneit and the compressor will stop. thanks for your quick reply and answer. don

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  • parkit527 Jan 04, 2009

    i want to thank you very much for solving my compressor woe's thanks for taking the time to help solve the problem Don

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Most single stage compressors come with a pressure switch set to shut off at 125 - 145 psi. These switches become less efficient over time and will Begin to fail but remain useful. A safety valve (brass plut with pull ring) is installed somewhere on your compressor set to open at aprox. 160psi. If the pressure switch shuts off before the safety valve activates you could probably continue to use the unit. If however you would like to have the unit shut off at 125psi replace the switch any switch that can be installed in the space allowed. The black tubing that you see is the unloader. When the unit reaches set pressure and shuts off, the small valve under the pressure switch will open and release the pressure in the tubing. This allowes the compressor to start with no back-pressure. For max. life of compressor make sure that there are no leaks in system and upplug when not in use.
Pressure switches are sold in pressure ranges from 45psi to 160psi. Some brands are better constructed than others. A squareD switch will give long life being used w/o extension cord. Good Luck

Posted on Jan 04, 2009

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