No water and a silent pump is one of the most stressful home emergencies. Here are 7 causes in order from easiest to check — most are fixable in under an hour.
Before anything else, go to your electrical panel and find the well pump breaker. It is usually a double-pole 240V breaker labeled "Well Pump" or "Water Pump." Check if it is tripped (middle position) or off. Reset it once by flipping it fully off then back on. If it trips again immediately, stop — there is an electrical fault that needs diagnosis.
The most common and easiest fix. Reset once. If it holds, you're done. If it trips again, move to the next causes.
Most pump motors have a built-in thermal overload that trips when the motor overheats. Look for a small red reset button on the motor body (jet pumps) or on the control box (submersible pumps). Wait 20-30 minutes for the motor to cool, then press the reset button.
Open the pressure switch cover and look at the contacts. They should be closed (touching) when system pressure is below cut-in. Burnt, pitted, or corroded contacts cannot pass current. Replace the switch ($15-35).
With a multimeter, verify 240V is present at the LINE terminals of the pressure switch. If voltage is absent, the problem is upstream — check the breaker, wiring, and connections between the panel and the switch.
A failed capacitor prevents the motor from starting. Check the capacitor for a domed or bulging top. Replace it ($8-25) and test.
Inspect all wire connections at the pressure switch, control box, and any junction boxes in the pump circuit. A loose or corroded connection can interrupt power. Look for green corrosion, loose terminals, or wire insulation that has melted or been chewed by pests.
If all electrical checks pass but the pump still won't start, the motor itself has failed. Confirm with an electrician using a motor winding resistance test. A failed motor means pump replacement.
An undersized tank causes low pressure, short cycling, and early pump failure. Check yours free in 2 minutes.
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