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Manage My Life

air will not shut off

by Manage My Life Last activity date:
May 8th, 2012

My craftsman 919165230 will not shut off when the air pressure reaches the set point

Tags:
Craftsman , Kenmore PRO Appliances
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Answers (10)
Sam A
Thank you for the update. No, the pressure regulator only regulates the air coming out of the supply hose to the tools. It is adjustable for different tool requirements for air pressure to operate that tool.

The air pressure electrical switch is what determines when the compressor shuts off at a pre-determined setting of the switch. If your air compressor model say's that its target psi is 125 psi that is when the pressure switch should shut off the motor.

I am sorry if I was unclear before. The terms pressure switch and pressure regulator can be confusing as to what there intent.

Sam A.
by Sam A
May 8th, 2012
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Manage My Life
IS THE PRESSURE REGULATOR SUPOSED TO SHUT THE COMPRESSOR OFF AT A CERTAIN PSI?
by Manage My Life
May 7th, 2012
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Sam A
Thank you for the update on the air compressor pressure switch.
The small line is the pressure relief line that unloads the pressure from the compressors head so it can restart when the pressure drops.

It should only drain the air for a few seconds and then close. If it continues to leak air then it will need to be replaced and it will come with the new pressure switch.

Sam A.
by Sam A
December 13th, 2011
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Manage My Life
found our why the air is not shutting off , where the shaft comes out are two power starter and in the middle is a switch , the brackets have broken off and was not by the shaft, put it back on useing some plastic ties ,I did let it pump up to 100 pounds and shut it off using the off and on switch , On the back side of the switch is a fitting has a small tube on it comming from the tee from the tank , air does come out of this fitting, took apart could not get fitting out , put back together , and called it a day. What are must target pressureset at .It's 25 gal tank and 1 5.5 hp
by Manage My Life
December 13th, 2011
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Sam A
Thank you for the update. The pressure tanks on these air compressors are rated for 300 psi burst.

Most of the single stage air compressors target air pressure, depending on models are somewhere between 125 psi to 150 psi.
It your air compressor is in good shape it will build pressure to about 20 % past the target pressure and at 5 psi beyond the target pressure it will pop off bleed down and reset it self.

I hope this information will help you.

Sam A.
by Sam A
December 12th, 2011
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Manage My Life
well I'm not sure what the set point is, scared to let it build up that far.well try it today and let it build up tp 120 pounds and see if it's letting the safety pop is working . if you don't get a respond for me it's been nice talking to you lol just joking. well let you know what happened
by Manage My Life
December 10th, 2011
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Sam A
Thank you for the update on the air compressor.

If you shut if off at 80 psi it will never activate the safety pop off because it will only pop when it reaches 5 psi above the target psi set for the air commpressor to normally shut off at.
It sounds like the pressure switch diaphragm is leaking but it should be leaking all the time.
You also may want to check the outlet pressure regulator and change its setting for the outlet pressure to see if the leaking pressure will also change.

Please let me know what you find out.

Sam A.
by Sam A
December 6th, 2011
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Manage My Life
I can turn it on and off using the power switch. I only let it build up to around 80 pounds . I do here air leaking ,put when it gets down to around 40 pounds it will shut off.After it reaches 80 pounds I have unplug it and the 2 contacts on top of switch if I take a screw driver and close them manually it doesn't leak any air, if I let off the 2 contacts it starts to leak air again. I haven't yet seen the pressure safety pop off go off , put I have open it manually to see if it works
by Manage My Life
December 6th, 2011
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Sam A
Thank you for your question on the air compressor not shutting off when it reaches its set pressure.

If the regulator will not shut off when it gets to the pre-set PSI then I think the contacts in the pressure switch may be stuck together.

If that is the case then the contacts are not stuck but the pressure diaphragm is not opening the contacts on the switch.

Can you manually turn the compressor off with the lever on the pressure switch?

If you turn the compressor off with the lever and you move the lever back to the on position does it restart?

Does the compressor as it continues to run build more pressure to the point of tripping the over pressure safety pop off?

Do you hear or feel any leaks around fittings.

Also check the drain cock for leaks.

If all the questions above are answered as checking okay then it sounds like it is the pressure switch.

Please let me know what you find out.

Sam A.
by Sam A
December 5th, 2011
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afritz afritz
Managemylife.com is always a great resource to find the answers to just about anything. Your expert will research your question and respond within two business days but usually sooner.
Answered in 3 minutes
by afritz afritz
December 2nd, 2011
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