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Old 01-06-2011, 08:33 PM   #1
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deep well submersible pump electronics


i installed a new pressure switch. when high pressure cut off (50 psi) is reached, pump fails to cut off. WHY?

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Old 01-06-2011, 08:50 PM   #2
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is the switch opening? Did you verify that? Is that all you did? Why did you replace the switch?

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Old 01-06-2011, 10:24 PM   #3
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deep well submersible pump electronics


You wired the switch wrong?
You installed the switch wrong and it's not seeing the pressure?
The plumbing is clogged and the switch is not seeing the pressure?
The pressure gauge is wrong and the pump is not pumping up to pressure so the switch never sees the cutoff point?
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Old 01-07-2011, 10:37 AM   #4
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deep well submersible pump electronics


Quote:
Originally Posted by hugh harrelson View Post
i installed a new pressure switch. when high pressure cut off (50 psi) is reached, pump fails to cut off. WHY?
There could be a variation between the gauge reading and the switch setting. What happens if you don't turn off the pump, will it pump up to 55#? Why did you change the switch?
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Old 01-07-2011, 10:17 PM   #5
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I cut the power on;pump runs; tank psi increases to above the cut off set point of 50 (30/50 pressure switch); pump continues to run; at 60+ I begin bleeding so that pressure does not go higher. I stop the bleeding; pressure now is reduced to mid 40s; I crawl from under my house and cut power to the pump. I installed a new pressure switch because on two previous occasions this problem was corrected when a new switch was installed. I did not remove the switch cover but assume, maybe incorrectly, that the contacts were still closed during all of this. Could the control box be the problem? Thanks for your input. Looking forward to your reply.
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Old 01-07-2011, 10:40 PM   #6
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deep well submersible pump electronics


make sure the water path from the pressure switch to the water pipe that feeds it is clear. A lot of time you can get sediment build up in small passageways that do not allow the pressure to actually reach the switch. Since the gages are usually not on the same little feeder pipe, it might be clean and show proper pressure.

So, take off the pressure switch. Look in it to make sure you haven't gotten some crud pushed up on the switch. Then clean out the pipe it mounts to with a wire or small brush. If you have somebody to help you, you could actually flip the pump on at the point to be sure you get flow. Use a cup or something over the opening to keep it from spraying all over (especially since you are working with electricity at this point.)

Once you are sure that is clear, put the switch back on and try again.
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Old 01-08-2011, 10:52 AM   #7
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deep well submersible pump electronics


What brand pressure switch you have there ?

Is any cold air is hitting the pressure switch because in some area when the cold air hit the pressure switch or small pipe they can get semi frozed up and may not let the switch function properly as Nap mention to clear out the gunk.

Did you get a new pressure gauge somecase the gauge can be bad as well those gauge should be under 15 Euros so that will be a good time to do it.

And did you do any adjustment with the pressure switch as well?

Last thing when you screw on the new pressure switch MAKE SURE that you do not let the teflon tape get too close to end of the pipe due some case teflon tape can actaually block the pressure switch port which it have very small opening.

Merci.
Marc

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