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A shallow well might make it to shut off pressure, but not a deep well. It maybe doubtful that a 240v pump will run on 115v, but it does happen.
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You would be surprised. I have had them working that way for years. They just won't build enough pressure to shut off.
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Check the voltage at L1 and L2 either on the outlet side of the pressure switch or at the control box.
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Make sure you have 240 volts to the pump. Half power or 115 volts can make it act that way, and could have happened during a power outage.
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It sounds like your pump or well is not producing enough water.