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A well pump brings water from your residential supply system into your plumbing. When the unit turns on and off repeatedly, the added strain can create a need for well pump repairs. Review the guide below to understand some of the causes of pump short-cycling.

Why Is Your Water Well Pump Constantly Turning On?

1. Loss of Air

Loss of air charge is a common cause of pump malfunctions, particularly in non-bladder pressure tanks. When there are problems in the control valve, the tank loses air pressure, sending incorrect signals to the pump.

To verify that this is the problem, check the condensation line of the tank. If the line is three-quarters of the way up, there isn’t enough air in the unit to keep the pressure stable.

2. Too Much Air

While a lack of air in the tank can cause problems, too much air also leads to short-cycling. Most common with captive-air tanks, overcharging can cause leaks or affect the functionality of the pump bladder. 

Turning off the pump for a while may drain some of the excess air. You can also reset the unit to the manufacturer’s settings. 

3. Clogged Supply Lines

Well Pump RepairWater supply lines can become clogged with minerals, sediment, or dirt, causing pressure to build up. The added pressure can cause supply leaks, which forces the pump to turn on repeatedly to make up for the loss.

To resolve this issue, a professional may need to clean the lines and replace the filter.

4. Defective Pump Control Switch

The pump control switch determines when the pump activates. If it’s faulty, it may not shut off completely after it turns on.

A defective switch may be simply filled with debris. Clean it if you spot any grime. Otherwise, you may need to have it replaced.


For well pump repair or replacement, reach out to Fogle Pump & Supply. They have served Spokane, WA, and the surrounding areas for more than 38 years. Their team of expert technicians provides comprehensive services with the latest technology, including constant pressure and variable speed pumps. To schedule a free estimate for well pump repairs, call (888) 343-9355. Visit their website to learn more about their services. 

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