I have a pressure pump from dam to house, the problem is the pump is running but no water . If you turn power off to pump for a minute then turn back on it works again.

It sounds like you have a leak somewhere. Turn off the valve supplying the water to the house. Wait however long it has been taking the pump to kick on by itself. If it doesn't kick on, wait another ten minutes. If it still doesn't kick on, turn the valve back on and wait to see if pump runs by itself. If it does, you have a leak somewhere. If this is not the case, your problem may be a bad expansion tank or pressure switch. Good luck!.

Loosen the nut on the top of the housing. It's a "captive nut", so it'll stay with the housing when you lift the housing off.

There'll be a large spring under that nut, with another nut on a threaded stud that runs through the center of the spring. Turn that nut clockwise to increase pressure, or counterclockwise to decrease pressure. If you turn it counterclockwise, you have to run some water to bleed the pressure out of the plumbing before you can tell any difference - it won't instantly drop the pressure in your plumbing. It only tells the pump when to run & when to turn off.

If water is back up above the intake, it should prime itself in a few minutes. As long as you don't let the case get hot to the touch it should be okay to run dry.

If it fails to prime and pump up pressure, you may have to prime it.

You have a waterlogged pressure tank. To fix this problem, follow these steps:

1. Determine your cut in pressure by looking at the pressure gauge and seeing when the pump turns on.

2. Shut off the electric to the pump and shut off the main water to the house.

3. Drain the water from the pressure tank completely. You can do this by opening the drain at the bottom the the pressure tank.

4. With a air compressor and tire gauge (don't use pressure gauge on the pump) put enough pressure in the tank so that it is two psi less than the cut in pressure. So if your pump turns on at 30 psi, put 28 psi in the tank.

5. Turn the power back on to the pump and let it run till it shuts off.

6. Turn the water back on to the house.

7. This should fix the problem. If it does not, the bladder in the pressure tank is bad and the whole tank needs to be replaced.

This is a general fix without knowing your make and model of pump or pressure tank. This is a universal way of fixing this problem.

First check with a pressure gauge to see that the pressure is, indeed, dropping. Then, if it is possible, turn off the outlet valve to isolate the pump.
If pressure is still dropping, there is probably a check valve on the inlet of the pump that prevents water from the high pressure side from leaking back to the inlet piping side.
To test this, let the pump run and pressurize the house and immediately close the valve for the incoming water. If the pressure holds, then open the inlet valve and see if the pressure drops. If it drops, the inlet check valve has to be replaced (or cleaned).
Gary

The water and therefore the pressure has to be going somewhere. If you are sure that there are no leaks in the house or outside, then the water is going back into the well. There is a check valve either in the suction line of the pump between the top of the well and the pump or down in the well.
If this check valve fails, it allows water to go the wrong way and back to the well. The result is that you lose pressure.
Secondly, you have to be sure that there are no air leaks between the top of the well and the inlet to the check valve. Leaks in that piping will make repriming difficult.
Write back with more and I'll try to help more.
Gary

If there is a surge tank in the system this is not working.
Try raising the cut-out pressure. It sounds like the pump is reaching high pressure even when you are using water.
Gary

In order to clean the unit you need to connect a small sump pump to the cold inlet, and run a hose from the hot side into the same bucket. Pour about a gallon a white distilled vinegar in the bucket, and turn the pump on. Let the solution run through the unit for about 15 minutes, then reverse the hose connections and run the pump for another 15 minutes. Reconnect the water supply and outlet. Turn the water on in the bathtub first on the hot side and let ir run for a few minutes before turning the power back on to the heater. While the water is still running turn the power back on and reset the thermostat. If you get a lot of debris in the bucket, you may need to consider installing a water-softener to prevent scaling.

If you can meet your needs with the pressure you have now, reduce the pressure cut off switch pressure until it shuts off. Your housing is probabbly sealed to the motor. Try shocking it with a rubber mallet to break the seal.

The copper line and the pump. Which is the concern?
On the circuit breaker, Turn it off and in five minutes, back on.. Then check the outlet at the cooler to see if it's getting power.The copper water supply line? You do have water to the float control valve? or no?