The tap sputters, coughs a little air, and quits. Now you are standing in the utility room wondering whether this is a two hundred dollar afternoon or a much longer week.
Most of the time it is one of four things: power, the pressure switch, the pressure tank, or the pump itself. In a dry year in southern Oklahoma, there is a fifth: the well itself is not giving up water the way it used to. Those five problems feel identical at the kitchen faucet and cost wildly different amounts to fix, so the goal of the next ten minutes is to figure out which one you have before anybody drives out.
Work through these in order. The first three cost you nothing but time.
Start at the breaker, then check it again
Go to the panel and find the well breaker. It is usually a double-pole 240-volt breaker, often labeled "well" or "pump."
Here is the part people miss. A tripped two-pole breaker frequently does not snap all the way to OFF. It sits in a mushy middle position that looks close enough to ON that your eye skips right past it. Push it firmly to OFF, then back to ON. If it holds, you may have just fixed it.
If it trips again immediately, stop. A breaker that keeps tripping is telling you there is a short somewhere in the pump, the wire, or the control box, and cycling it repeatedly does not help anything. That is a service call.
Read the pressure gauge, because it narrows everything down
The gauge sits near your pressure tank. Whatever it says right now is the single most useful piece of information you can give a well tech over the phone.
Zero, and the pump is not running. Power is not reaching the pump, or the pressure switch is not closing, or the pump has failed. This is the most common reading on a no-water call.
Zero, and you can hear the pump running. Worse news, usually. The pump is turning but not moving water. That points to a failed pump end, a broken drop pipe, a stuck check valve, or a well whose water level has dropped below the pump intake.
Forty, fifty, or anything normal, but no water at the tap. The problem is downstream of the tank. A closed valve, a clogged sediment filter, a frozen line in January, or a failure in the house plumbing rather than the well.
Bouncing rapidly between two numbers. Your pump is short cycling, and the pressure tank is the first suspect. That is a different article and a different repair.
Tap on the pressure switch, carefully
The pressure switch is the small gray box mounted on a little tube near the tank, with a cover you can lift off with one screw. Inside are two contact points that physically close to send power to the pump.
Those contacts pit, corrode, and burn. On a well that runs hard through an Oklahoma summer, a switch is genuinely a wear item, not a lifetime part. If the cover comes off and the contacts look black, scorched, or welded together, you have probably found your problem, and the part is not expensive.
Do not go poking around in there with a screwdriver while the power is on. There is 240 volts sitting behind that cover, and it will hurt you. If you are not comfortable pulling the breaker first and checking with a meter, leave the cover on and tell your well tech what you saw.
Knock on the pressure tank
Rap your knuckles from the top of the tank down to the bottom, listening as you go.
A healthy tank sounds hollow up top, where the air charge lives, and solid down low, where the water sits. You should be able to hear roughly where the line between them falls.
A tank that sounds solid all the way from top to bottom is waterlogged. The bladder inside has ruptured and the air cushion is gone. A waterlogged tank does not usually cause a complete loss of water on its own, but it destroys pumps, so if you find one while chasing another problem, deal with it in the same visit.
The southern Oklahoma question nobody asks first
Everything above assumes the equipment failed. Sometimes the equipment is fine and the water moved.
Oklahoma has spent a long stretch in drought, and static water levels in a well are not fixed numbers. They rise and fall with recharge. When the level drops below the pump intake, the pump starts pulling air, and the symptoms mimic a dying pump almost exactly: water that runs for a few minutes and quits, comes back an hour later, then quits again.
That intermittent pattern is the tell. A failed pump stays failed. A well that is running low recovers when you leave it alone and fails again as soon as you draw it down. If your water comes back after a rest, say so when you call, because it changes the diagnosis and it changes the fix. Lowering a pump, deepening a well, or adjusting how the household draws water are very different conversations from swapping a motor.
Two other things point the same direction. Air spitting at the faucets, and sand or grit showing up in the bottom of the toilet tank. Grit means the pump is working near the bottom of the well and pulling material it was never meant to move, which will take out the pump end if it continues.
What not to do
Do not pull the pump yourself. On a two hundred foot well you are lifting a motor plus two hundred feet of pipe full of water, with live wire attached, over an open hole. People get hurt doing this, and dropping the assembly down the casing turns a pump replacement into a much larger job.
Do not keep flipping the breaker to see if it comes back. If the pump is running dry, every restart cooks the motor a little more. A submersible motor is cooled by the water it sits in.
Do not dump bleach down the well because the water smells bad. Chlorine has a legitimate place in well work, but guessing at the dose is how people damage a system and end up with water they can taste for weeks.
When to call
Call once you have the gauge reading and can answer three questions: does the pump make any sound, does the water come back after resting, and has anything changed recently such as a storm, a new appliance, or work near the wellhead.
Those three answers usually tell an experienced tech what truck to bring. M&M Water Well Service has been working on wells in Carter, Stephens, and Comanche counties, and most no-water calls in this part of the state come down to a switch, a tank, a pump, or a water level. Getting it right on the phone saves you a trip charge for the wrong diagnosis.