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Tool Talk Discussion Board

Well Pump questions trouble shooting.

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Posted by rc H20 less on September 18, 2012 at 12:01:00 from (

Wife called said we had no water.
Came home put the voltmeter to the pressure switch.
Reads 240vac going to the motor.

Waterline inlet pressure reads 20 psi. The pressure switch is factory set to 30-50psi.

Went to the well pulled the cap. Can see water 6 feet down.
There is no control box.
Noticed one of the wires was floating in the air (Yellow wire). Checked the voltage across the Red and Black wires its 240vac.

The yellow wires I'm not sure if they ground to the well casing or to one another. I assumed one another. Without connecting the yellow wires I checked the voltage from Red-yellow(house) 120vac
Black-yellow(house) 120vac. Yellow is neutral.

No circuit breaker tripped. I have 240vac on the red and black wires at the well. With power off I checked the resistance at pump Red - Black (41k ohms) but I did not disconnect the pressure switch. Red-Yellow is +Mega Ohm same with Black to Yellow. One was a bit more.

Any thoughts? Breaker is not tripping. I'm guessing wire or pump issue. The wires from the house are spliced at the pump. Cutting those and measuring resistance might tell me the condition of the motor?


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