Question about Craftsman Air Tools & Compressors
I got a 25 gallon compressor (oil less unit) it runs fine builds up pressure but it will keep building up pressure in the auto mode and will not cut off unless I turn it off or the relief valve blows the excess pressure. Need help whats needed to fix problem
The pressure switch has snap action contacts that are opened by a diaphragm pushing against a spring mechanism. Unplug the compressor and remove the cover to the switch and look for the contacts. Make sure that they are not welded together from use. Move the on/off lever to see if they open and close. You may have welded contacts or broken mechanism within switch. A factory replacement is expensive, however if you are a tinker-er you can use a lower price generic pressure switch available on ebay. Switches are sold by pressure range, you need a 120#. Fittings may need tweaking. Enjoy
Posted on Dec 12, 2008
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Posted on Jan 02, 2017
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