well pump won't cut in or out

Discussion in 'Pumps and Tanks Well Forum & Blog' started by Geoff Morris, Jan 1, 2005.

  1. Geoff Morris

    Geoff Morris New Member

    Messages:
    4
    hello all,all of a sudden my pump won't kick in,if i hold the contacts in the control valve closed the pump works and i get water,once it goes over 20psi the contacts stay closed and the pump continues to run but then won;t kick off,i hae taken the pressure switch apart,the diaphram looks ok,i cleaned the contacts but still no operation
    Last edited: Jan 1, 2005
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,156
    Location:
    New England
    Is the line to the pressure switch clear? Debris might give you this kind of problem I think. I'm not a pro.
  3. Geoff Morris

    Geoff Morris New Member

    Messages:
    4
    pipe to valve

    thx for the reply Jim,i did check the inlet pipe to the switch and it does seem to be clear
  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,156
    Location:
    New England
    Is it possible to assemble the pressure switch backwards? I don't know, but it almost sounds like it is working backwards - if you force it on, when it reaches the high point, it doesnt' turn off. WHen it is low, it doesn't turn on.
  5. Deb

    Deb Plumber

    Messages:
    200
    Location:
    Idaho
    Deb

    You may be running out of water. The switch will not stay on in a low/no water condition to protect the pump.
    Deb
    The Pipewench
  6. Geoff Morris

    Geoff Morris New Member

    Messages:
    4
    switch operation

    thx for the reply's,how does this pressure switch work exactly??,should the contacts be defaulted closed with no pressure like even when it's off and has no water pressure????,cause mine are always open,i don't see how that can work
  7. Deb

    Deb Plumber

    Messages:
    200
    Location:
    Idaho
    Deb

    "should the contacts be defaulted closed with no pressure like even when it's off and has no water pressure????,cause mine are always open,i don't see how that can work"

    The contacts are defaulted open--no electrical current going through to the pump until it is called for. "no pressure" ??? There should be a minimum pressure that is consistent with the kick on pressure on the switch (it should never be 0). When the pressure drops below the kick on pressure, the contacts close and the pump kicks on and pumps until the kick off pressure is reached (usually a 20# differential from the kick on pressure). The pressure in the pressure tank, checked with all water emptied, should be 2#s lower than the kick on pressure for the pump. If your gauge is showing 0 pressure, post back and tell us more about your system--type of pump, how deep, etc.

    I am not sure that I completely understood your questions correctly. A well system can be complicated and there can be various reasons for a "no water" condition that may be beyond the ability of the average Joe (or Jane) to diagnose.

    Deb
    The Pipewench
  8. Gary Slusser

    Gary Slusser That's all folks!

    In your I assume low pressure safety switch the default for the switch is points opened; low pressure opens them if the pressure falls below 20 psi (usually). Regular switches are default closed; and open with pressure equallying the cut-out seting of the switch. So my assumption you have a low safety cutoff switch.

    Normally a low safety cutoff switch is used where the well will allow the pump to suck air due to the water level falling to the inlet of the pump. That's done so the pump doesn't set there running dry. You have (don't you?) a little handle on the side of your switch that alows you to close the points and start the pump. When you do and the pressure exceeds 20 psi you can let go of the handle AND turn it to AUTO. The pressure is supposed to build until the cut-out setting is reached but.... it sounds as if your switch is having a problem sensing that pressure increase. That is usually caused by a blockage in water flow to the switch. The nipple the switch is installed on or the tubing to a jet pump switch and its fittings and the holes they screw into is usually blocked.

    Gary
    Quality Water Associates
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