Kobalt compressor builds pressure in tanl but nothing comes out the hose.

by Ron
(Blue Springs, Mo)

I have a 10 gallon Kobalt air compressor. When I turn it own it builds up pressure in the tank. But the electronic display shows 0. If I push the button to show tank pressure it shows that it is at 150. But there is no pressure coming out where the hose plugs in.


I feel and hear air coming out. I bought this from Lowes, but they will not honor the warranty. When I called the factory, I found out that they have been bought by someone else and they would not honir the warranty either. Any suggestions on how to fix this compresor?

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Bill says...

Hi Ron:

I'm not quite sure why you need electronics on a small DIY compressor.

Where the air comes out of the tank there is usually a nipple. On low cost compressors, there is a regulator with gauge on the nipple, and then, downstream from the regulator there is a coupler. You plug the connector from the air line into this coupler, and this allows air to flow down the air line to the tool.

If there is a full charge of compressed air in the tank, then there is only two things that could be stopping the air flow.

One is that you or someone has turned the regulator pressure setting to zero, effectively turn the regulator into a valve that you have shut off.

Two is that you are inserting a connector into the coupler that isn't of the same make or configuration as the coupler is, and that connector is not opening the check ball in the coupler which prevents air flow.

Carefully look inside the coupler on the compressor. Do you see the little ball at the back, inside? Using a small blunt instrument, carefully (do not look inside the coupler while you are trying this)push on that ball and you will know right away if there is air pressure behind it. If there is air, then your connector may be the problem.

If there is no air there, then suspect that the regulator is turned off.

Please see the pages on regulators, couplers and connectors on this site for more info if you feel you need it.

Cheers,

Bill



Comments for Kobalt compressor builds pressure in tanl but nothing comes out the hose.

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Feb 15, 2011
coupler - how is that used and do i need a special nipple the go to it?
by: Anonymous

i have a kolbolt tank i bought the other day and the coupler has a needle looking stem in the center of it. how is that used and do i need a special nipple the go to it?

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Bill says...

Good question.

Why don't you wander over to the coupler and connector pages, where these things are are spelled out for you?

Cheers,

Bill


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Hose keeps blowing off

by jennifer
(texas)

I have a kobalt 1.5 gallon 135 psi portable air compressor, when I'm using it to air up tires or even the kids bike tires the hose keeps coming off. Is there a better hose to use than the one it came with? Even on a low psi setting.
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Well Jennifer, it would help if I knew where the hose is blowing off the compressor.

Also, since you don't indicate the model number, I cannot even try to find the model on line to look at it and see if I can figure it out.

Typically the hose that comes with a low cost air compressor is an inexpensive PVC hose, and may only be attached to your compressor with a pressure clamp, as opposed as a coupler / connector combination.

Regardless, if the pressure clamp is loose, then the hose will blow off.

Have a look at the coupler and connector pages on this site, along with the hose pages for some tips.

And, if you wish me to pursue this with you, then you need to either add a photo or two (start a new thread to do that) or at least provide the model number.

Cheers,

Bill

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Kobalt 103798 - Minimal Pressure through hose/fluctuates.

Kobalt 30 gallon, oilless, single stage, direct drive.

The tank gets pressure, but the regulator will initially build to my operating pressure, but then when the hose is used (tool or just blow air), the pressure immediately drops to minimal. The regulator pressure will then fluctuate from 10psi up to 40 or so then drop back to 10. The whole time the regulator does the clicking noise as if it is continually trying to adjust the regulated pressure.
I have disassembled, checked and cleaned the regulator and it appears okay. I am unsure about anything else. I think the clicking is coming from 1 of the 2 solenoids on the bottom.
Thank you.
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Friend, I'm a bit confused. My understanding is that the air regulator is the device on the discharge manifold from your air tank to your air line, and with it, you adjust the pressure of the air you want flowing to your air tool.

If your post is about what I understand to be the pressure switch (see both pages linked from the site map for more info) then, assuming your power supply is good,you may need a new switch.

Cheers,

Bill

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May 06, 2014
clicking noise
by: Anonymous

I have similar problems as other two posts. I am able to get tank pressure but then it makes a constant clicking noise.
I am able to use the hose to put air in tires and use the compressor. It will kick on to refill but then after it makes pressure it will do the clicking noise again.
Lately it has been losing pressure on its own a lot.
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Replace the digital regulator with a manual one.

Consider checking the tank check valve to be sure it's not leaking.

B.


Sep 03, 2012
same problem
by: Rick

I have the same problem. It used to work fine.
The air pressure is electronically controlled with a digital display, no mechanical adj. available, just buttons I push to adj, or switch off.
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Same answer, Rick. If your symptoms are the same as the Original Poster, then I think that your air regulator is pooched.

B.

Feb 15, 2012
Maybe I misworded things...
by: Original poster

The pressure switch?

But the unit runs and the tank get pressurized. I just can't get any air through the hose. The display will read 8opsi to use (the tank is pressurized higher), but when I pull the trigger, it immediately drops to 10 psi or so. Then slowly tries to build back up and fluctuates between 10 to 40 psi.
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I suspect that your air regulator is fouled or failed.

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kobalt air compressor RPM"S fluctuate

by Adam
(Il.)

just bought an 80 gallon kobalt air compressor and had it wired up. worked great the first day and broke it in like in the owners manual. the next day i noticed the rpm's on the electric motor would surge. it sometimes sounds like it is running so slow it may shut off then it jumps right up. it seems like the longer the compressor runs and surges it eventually clears itself up. i have not tried it since as i dont wish to blow up my new compressor. this is my first compressor and am clueless as to what to check. the electrician i had wire it up is coming out to check some things but other than that im at a loss.

i have a 30 amp circuit breaker in my fuse panel and the electrician said its only drawing 9 amps of current when running. maybe i got a bad one and the motors going out after maybe 3 hours of ues?

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Bill says...

Adam, if there is no other device in the electrical supply circuit to the compressor that might be pulling amps and current from the line to the compressor, and your electrician indicates that the supply line is clear of interference, then it does sound like you might have a lemon.

Cheers,

Bill

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