Bostitch CAP1512-OF will not stop Running

by Jin

Bostitch CAP1512-OF air compressor

Bostitch CAP1512-OF air compressor

I have this Bostitch CAP1512-OF compressor and recently the compressor keep going. Once the it reaches 150 PSI then the safety valve popped open. Is there a sensor in the tank to monitor the tank pressure? If not, what is controlling the tank monitor?

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Being a mini-oil free air compressor, this model doesn't have a more typical pressure switch.

It does have a pressure switch, however, and since it is the pressure switch that controls on the ON / OFF of the compressor, I suspect yours has failed.

I had no problem finding one on line, available in the $15 range, and I suspect that if you get one and change out yours, the compressor run on will disappear.

Cheers,

Bill

Comments for Bostitch CAP1512-OF will not stop Running

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Sep 17, 2015
Running on Bostitch
by: Bill

Are you perhaps saying that you think that the PRV has a weakened spring and is popping too soon?

That's possible, though often they don't have a spring. Replacement PRV's are not that expensive.

If your compressor runs up to the normal cut out and stops while you are holding the PRV in, then yes, I would guess the PRV is failing.

Sep 17, 2015
run on
by: Anonymous

Mine is doing the same. I just put in a new OEM pressure switch. It still runs until the pressure relief pops. If I hold it, it does shut off at 150-155. I believe that the tension spring in the pressure switch has weekend with time, and is popping too soon, thus not having pressure enough to reach the shutoff switch needs.

May 05, 2015
Where is the Bostitch pressure switch
by: Bill

I haven't torn this compressor down, Jon. I surmise you are correct, however, that this model has an on-tank switch. What I call a mini-switch.

If you can get the shroud of the control panel off, see where the wire from the ON/OFF switch leads to. Odds are that's the pressure switch on this Bostitch.

May 05, 2015
where is the pressure switch
by: Anonymous

Is the pressure switch the item that screws into the tank? If not, where is it?
Jon Fischer

Oct 21, 2013
where do i buy a good pressure switch?
by: Anonymous

Hi Bill,

Thanks for your input. Do I have to use OEM type pressure switch? If not, i would like to use an aftermarket brand. I think after market brand have better quality. Can you you please send me a link that where i can find a "GOOD" one to replace my current one?

Thanks!!
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Not sure about the aftermarket parts being better quality.

As to the parts availability, you'll need to do what I would do, find the original OEM part and then use that information to find another source. That is, unless someone chimes in with a referral for you.

Cheers,

B.

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Bostitch air compressor will not turn on

by Jim Edwards
(Sycamore, IL)

I tried several outlets directly (no extension cord) but the compressor will not turn on.
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Jim, is there air in the tank? Unplug it and drain the tank to zero PSI, close the drain, plug the compressor in and try again. Any change?

Assuming not, confirm that the socket you are plugging the compressor into has power. I use a trouble light plugged into the socket as a quick check.

Assuming you have power at the socket, and the plug cable to the compressor is sound, the power is flowing to your pressure switch.

You need now to be sure that the pressure switch has tripped to on - meaning power is flowing to the motor circuit. With no air in the tank the pressure switch should have tripped to on.

You now need a meter to check and see if power is actually on the motor side of the pressure switch.

If power is on the motor side of the switch, then the pressure switch is working, and the next check will be the start capacitor. See how to check that on another page on this site.

Cheers,

Bill


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Converting Bostitch 1580WB for 220

by Tommy
(MS)

The Bostitch 1580WB compressor is wired for 110 volts from the factory. The electric motor on these compressors are capable of running on 115/230, as identified on the motor spec label.

The question I have is it possible to rewire for 220 volts with factory pressure switch and how.

Also factory cord from power source to pressure switch is a 10 gauge 3 wire-black,white,and green, the cord from pressure switch to motor is 12 gauge? 2 wire-black and white with no ground. I know you need 2 hots and a neutral or ground for 220 to work. Thanks

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Oct 29, 2013
220
by: Doug in s.d.ca

If you're worried about 220 vs 230, don't.

You only need neutral if you need 110 for a control module or somesuch.

Rewire the motor with the blk/wht cord according to the plate.

Replace the power cord and/or plug or wire direct. Ground (not neutral) goes to the frame of the machine. There may be a ground lug in the pressure switch. The two hots go to pressure switch contacts.

Lotsa fun.

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Air compressor builds air, but little to no release pressure

by Charles
(Florida)

My Bostitch air compressor builds pressure just fine and shuts off as should, but no pressure through the hose. I've tried different hoses and still little to no release pressure when using. Tank is full, refills perfectly, but can't use...nothing through the hose. Ideas?
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Start by reading the page about "why no air from hose" on this site, and then adding a comment here with what you found, Charles.

B.

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