Tip & How-To about Plumbing

Well Water Problems Well Pump Problems

Dealing with the many issues of having a well pump and a water well system can be very trying. There are many things that can go wrong with the shallow well or jet well pump.

  1. The foot valve or check valve at the bottom will fail. This is often caused by normal deterioration of the metal and it will eventually fall apart. When this happens all the water that you just pumped will go shooting back to where it came from and the pump will be turning on and off very quickly.
  2. You will get a hole in the pipe or a fitting will loosen up just enough to allow an air leak which will cause the pump to loose prime and run continuously. Finding a small air leak came be mind boggling, be patient and check everything twice…
  3. Wearing of the impeller and the insides of the pump gives too much space inside and the pump will not be able to make enough pressure to shut down like it once did. You can back down the pressure switch to get it to shut down, but the pump will need to be replaced.
  4. Dirt can get inside the little hose going to the pressure switch making the on and he off delayed. This will make the shutoff too high and the turn on too low. Take the hose off and blow it out. Remember to also clean out the fittings at the switch and the pump.
  5. Do not hookup any kind of plastic fittings or pipe directly to the pump. If the pump looses prime it will get very warm and make them leak. Always thread a metal fitting into the pump and then transition to plastic away from the pump.

These are a few of the common things that can go wrong with shallow well jet pumps.
This is not a complete list as I have seen many crazy things happen. Hopefully this will guide you and help with some of the most common issues that can come up.




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1 Answer

I have a 2000 ford Taurus I have changed the water pump and thermostat and it still runs hot why

Hi Lucas, Im AL the owner of Big As Auto Repair

Lucas, first thing to check for is make sure the cooling fans are coming on. Second thing to check and very common issue after replacing the water pump, is air trapped in the system. Make sure you get all the air out of the system. Some systems have an air bleed screw to help with this issue. If the fans are coming on and all the air is out of the system, then you'll want to check for coolant flow in the radiator. CAUSION: Let the engine cool before taking the cap off the radiator. After removing the radiator cap start the engine and let it idle, if the coolant does not flow after reaching operating temp, then you may have a restriction somewhere in the system. The other thing to check is make sure you put the thermostat in correctly, some vehicles you can install it backward, make sure the spring end is going toward the engine. If you have coolant flow and the coolant is blowing out of the radiator you may have a blown head gasket or timing issue. Hope this helps and please send people to my auto-repair-website at: http://www.bigasautorepair.com/

Sep 30, 2015 | 2000 Ford Taurus

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Either the impeller has come loose (it won't pump anything) or else it's "cavitating" (churning an air pocket) because it has nothing left to pump. It's possible, too, that it's just sucking air bubbles.

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Try removing the thermostat and reverse flushing the motor, Actually try flushing in both directions, this will tell you if you have a circulation problem but 1 thing you should know is that the water goes in the water pump and out the thermostat, try running it without the thermostat and check your water flow

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Some things I have seen that causes this issue:
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I have a 2004 Chevy Impala. I just recently noticed that I have heat while the car is moving but once I stop at a traffic signal the heat goes away and the water temp goes up on the gauge.

Check your coolant level. This will happen when air passes through your system; the engine will heat up rapidly, and the heater will go away. You do not want to run it that way, otherwise you'll be dealing with severe engine damage. If your coolant level is good by chance, you may have to look at replacing your water pump, thermostat, or both, but I'm confident that your are dealing with a coolant issue.

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