Why does my water pump keep starting and stopping?

Author: Halie Hand II  |  Last update: Monday, July 6, 2026

Insufficient water supply to the pump can cause it to turn on and off frequently. This may be due to a clogged inlet screen, a malfunctioning well pump, or a low well yield. Problems with the pressure tank, such as a waterlogged tank or a faulty air pressure control, can cause the pump to short cycle.

Why does my water pump keep kicking on and off well?

If the water pressure is too low, the pump turns on. If the water pressure is too high, the pump turns off. This process of turning on and off is called cycling. Unfortunately, cycling can be very destructive to a well pump because it shortens the life of the motor and puts excessive wear on the control components.

How to fix a water pump short cycling?

Letting it run full speed for a few moments may dislodge any debris that might be causing your problem. If that doesn't fix it the surest solution is to put a check valve in the water line between the water pump and the fresh tank, the inlet side of the water pump. Pretty simple to do and not expensive either.

Why does my water pump start and stop frequently?

Too Little Air in the Reservoir Tank

These tanks depend on air pressure within to regulate the pressure switch. If the inside air pressure drops, the tank will not trigger the pressure switch correctly, causing the pump to switch ON and OFF erroneously.

Why is the water pump turning on and off?

If the pump just keeps turning on and off it's building too much pressure in the system and could short out your pump. When you turn on a faucet you release water pressure out of the closed system, once the pressure in the system drops below the set amount it will kick back on to rebuild pressure .

Troubleshoot: Water Well Pump Starts too Often (Rapid Cycling)

Why does the pump keep shutting off?

There is a reason gas pumps have an annoying habit of shutting off. Gas pump nozzles are designed with a device on the end that turn off the fuel flow when the gasoline runs back into it. This is a safety mechanism which prevents the gas from coming out and spilling when filling up the tank.

What is short cycling in a pump?

Well pump short cycling refers to the situation where the pump turns on and off repeatedly within a short period. Depending on your water usage, your well pump should run for a few minutes and then stay off for a significant duration.

What is it called when the pump starts and stops frequently?

Short cycling, for all intents and purposes, refers to a water pump that turns on and off too frequently.

Why won't my water pump stay on?

Inspect your breaker box and see if the breaker has tripped, and if it has, then reset it and you should restore power to the pump. If the breaker trips again, then there is an electrical or mechanical issue with the water pump, which will require a professional plumber. Ensure the “on” switch is engaged.

How do I know if my water pump is going bad?

Water Pressure

The most obvious sign that your water pump is going bad is that your water pressure may get a bit weaker. If this does happen, it is not guaranteed that this is the reason behind it but getting it checked out by a professional is definitely a good idea.

What does short cycling mean?

In the heating, ventilation, and air conditioning (HVAC) business, short cycling is a phrase used to describe when a heater or air conditioner cycles on and off too frequently. It signifies a problem in your heating system's proper functioning and efficiency, in which it is not completing its heating processes.

Why does my water pressure drop and then come back?

Why does the well water pressure drop and then come back? It may be due to a malfunctioning pressure switch or issues with the pressure tank. It could also be due to blockages in the plumbing system that eventually clear up, restoring the pressure.

How to fix a short cycling well pump?

If you have sufficient air but still have short cycling, you may have a faulty or clogged water pump pressure control switch. This can occur when the water is full of silt or other debris, or when the water has high mineral content. Replace or repair the switch to restore normal function.

Can you add air to a pressure tank with water in it?

To ensure the longevity and efficiency of your well pressure tank, there are a few simple steps you should take when adding air. First, turn off the water supply to the tank to prevent any mishaps during the process. Then, drain any excess water out of the tank to create more space for the added air.

How to reduce pump cycling?

What You Can do to Prevent Excessive Cycling on Your Water Pump
  1. Repair the tank air volume control.
  2. Drain the water tank and let air re-enter the tank.
  3. Drain the water from the tank and use the air inlet valve to recharge air back into your tank. The air charge should be 2 psi lower than you pump cut-on pressure.

Why does my water pump keep turning on and off?

Insufficient water supply to the pump can cause it to turn on and off frequently. This may be due to a clogged inlet screen, a malfunctioning well pump, or a low well yield. Problems with the pressure tank, such as a waterlogged tank or a faulty air pressure control, can cause the pump to short cycle.

Why does my water pump stop after a few minutes?

Some common causes include: Loss of prime: If the pump loses its prime, it will not be able to draw water into the system and will shut off. This can be caused by a leak in the suction line, a clogged suction filter, or a problem with the check valve.

What is the most common problem of a water pump?

Water pumps are essential for various applications, but they can also experience common problems affecting their performance and reliability. Common problems include overheating, leakage, low water pressure, noisy operation, and cavitation.

How often should a water pump kick on and off?

So a minute on and a minute off has always been the minimum rule of thumb. Two minutes on and two minutes off is just that much better for the motor. With the old conventional pressure tank method, the pressure tank fills at the rate the pump can produce, less the amount of water being used at the time.

Why does my well water stop and start?

If you hear it turn off after a few seconds, only to turn itself back on again, this may be a sign that the well pump motor is damaged. If you are able to do so safely, disconnect the wires at the site of the well so that you can check on the electrical current.

How to tell if a well pump is bad?

Some of the most common indicators of a faulty well pump and pressure tank include:
  1. Fluctuations in Water Pressure. ...
  2. Noisy Pressure Tank or Clicking Sounds. ...
  3. Spitting Faucets. ...
  4. Scalding Shower Water. ...
  5. High Electric Bills.

How do you fix short cycling?

How To Stop and Prevent Short-Cycling
  1. Check your air filter. Believe it or not, a clogged air filter can cause a wide variety of air conditioning issues. ...
  2. Check your thermostat placement. ...
  3. Check your air conditioner's refrigerant levels. ...
  4. Replace the low-pressure control switch. ...
  5. Check the compressor.

What to do if the water pump keeps running?

A smart first step is to ensure faucets and taps are turned off and also inspect appliances that use water, such as your dishwasher, washing machine, water heater, or outdoor sources like sprinklers or hoses. If any of these is on, it can also cause your well pump to stay on.

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