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Old 09-24-2009, 06:31 PM   #1
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Well control box problems

I have a well that was new in 2002. Yesterday the Franklin control box burned up. This morning a repair man came and replaced the box. This morning everything was fine. Tonight it burned up the compacitor in the box again. We found a spare in the garage and it fried it too. It will work fine for about 2 cycles of cutting on and off then it burns up the box again. It's a submersible pump 1 hp but that's all I know about it. Is it possible the pumps bad or is it something else?


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Old 09-24-2009, 07:48 PM   #2
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Location: Bellingham, Washington
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Pump problems

It is very likely a problem with the pump and/or pump motor since the capacitor kick starts the pump motor. First, check the ohms of the wiring going from the pump control box to the wellhead. There are specific guidelines for the wiring resistance readings. You may be able to find the specifications on the lid of the control box. If not, check the website for the specific type pump you have, i.e., Goulds, Meyers, etc.
If the ohms ratings of the submersible wiring is right, you most likely have a pump motor problem. There is one other thing to check. Pull the well cap and drop a plumb bob down to measure the depth of the well and the water level in the casing. The pump should be no closer than 5 feet to the bottom of the well. If it is closer than that, it may be sucking mud or silt and that may have partially plugged the pump inlets, causing a heavier than normal load on the pump motor.
You may have to raise the pump slightly in the casing.


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Old 10-01-2009, 06:29 PM   #3
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Control Box

Control Boxes have overload relays that should kick out and reset automatically. Blowing capacitors is unusual. Checking the ohms of the 3 wires going to the well will tell if there is a short in the wire or shorted motor.

Checking the 3 wires to the well pump will an Amprobe will tell if the relay is working properly or if there is to much amperage being drawn or a locked motor rotor. Be sure the control boxes and capacitors match the motor horsepower and voltage. Check the motor size and voltage against the metal tag on the Franklin Control Box.

Porky Cutter, MGWC
"NGWA" Master Ground Water Consultant
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