Kobalt compressor builds pressure - but no air at hose

by LARRY
(STAFFORD)

I have a Kobalt 10 gallon compressor with digital readout. The compressor builds pressure in the tank, but no air comes out of the hose, regardless of the pressure setting. The saftey valve, which is in the same housing as the air outlet, works fine.


THANKS

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Bill says....

Hi Larry... many, many questions about this issue. I wrote a page on it.

Click Compressor Issues in the nav bar, then Compressor Troubleshooting, then "Has no air out of hose" for details.

Cheers,

Bill

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Nov 07, 2011
no air at hose
by: Larry

Thanks Bill,

I read your page and determined the problem may be at the regulator or pressure switch. This is a digital model without any adjustment valve that I can see. Moreover, when I opened the housing that holds the regulator, safety valve and circuit board, air was flowing from the regulator. I was wondering if I need a new circuit board and how I would test for it. If it does need to be replaced, I found the entire module on line for more than the cost of a new compressor. Is there some way to swap the digital module for a gauge module?

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I don't know about testing circuit boards. Way outside my ken. If the regulator is a digital unit controlled from a circuit board, then yes, you acquire a new manual regulator, you dump all air, unplug compressor, disassemble the line where the regulator is, trash the junk, and install the new regulator in it's place. If you have to extend lines or add fittings, no problem, just don't use smaller lines or fittings than the original. Make sure you put the regulator in the correct orientation. Look for an arrow on the body, which shows the flow from upstream towards the tool.

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Air hose size

Your Air Hose Artical has a lot of very good information.

But I just have a small compressor (Kobalt Model 215921, 30 gallon on wheels). The air outlet at the compressor is 1/4". And some of my tools want a 3/8" hose and others do not. So what size of hose should I use? I was thinking of just using a 3/8" hose for every thing. Would that work?

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Bill says....

As long as your compressor has the flow capacity at the pressure you need to run the air tools you want to use, then there is no down side to upsizing the air hose line to them. You might want to look at PRESSURE DROP for more info on that.

If your Kobalt compressor doesn't have enough flow, a larger hose size will help a bit, but you may still run out of air flow and pressure, regardless.

Cheers,

Bill

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