Your well pump rapidly turning on and off (known as short-cycling) is usually caused by a waterlogged pressure tank, a failed air bladder, or a leak in your plumbing. This puts immense strain on your pump's motor and should be addressed immediately.
A well pump that continuously kicks on and off (known as "short cycling") is usually caused by a loss of air pressure in the pressure tank, a hidden leak in your plumbing, or a failing pressure switch. This rapid cycling puts extreme stress on the pump motor and should be fixed quickly.
Solutions to Prevent Short Cycling
If the pressure tank is undersized or waterlogged, replacing it with a properly sized tank can make a significant difference. Modern well water storage tanks with durable bladders are designed to maintain consistent pressure and reduce pump cycling.
Too Little Air in the Tank
If air pressure drops too low, the switch misreads the pressure, and the pump keeps cycling. Solution: Add air to bring the tank back to proper balance.
A healthy residential water well pump should cycle on and off roughly 1 to 6 times per hour during normal, active water use. Each cycle should last a minimum of 1 to 3 minutes to allow the motor to build pressure and dissipate start-up heat.
Well pump "short cycling" is when the pump rapidly turns on and off every few seconds or minutes instead of completing a long, steady cycle. This rapid starting and stopping causes extreme wear on the motor and can lead to premature pump burnout.
To determine if your well pump is bad, first verify you have power at the breaker box and test for voltage at the pressure switch. Common signs of a failing pump include sputtering faucets, sudden drops in water pressure, abnormally high electric bills, and unusual grinding noises.
Symptoms of a bad well pressure switch include the pump constantly running (or failing to turn on), rapid clicking or "short cycling", fluctuating or suddenly low water pressure, or no water delivery at all. You may also notice visible signs like burned electrical contacts or a clogged pipe nipple.
A 2-gallon-per-minute (GPM) well is considered low-yield. While it falls short of the recommended 5 to 10 GPM for standard households, it can still fully support a home if you manage water usage carefully or install a supplemental storage (cistern) system.
A failing water pump can severely damage your engine by preventing vital coolant circulation. Key warning signs include a steadily rising temperature gauge, visible puddles of pink, green, or orange coolant under your vehicle, or a high-pitched whining/grinding noise coming from the front of the engine.
You should expect strong water pressure in your showers and faucets in that range when using properly-sized residential water pumps. Any lower than 40PSI and some shower heads won't operate very well. Any higher than 60PSI -70PSI and you'll have to be careful not to burst any pipes that aren't rated for high pressure.
Here are the 10 most common AC short-cycling causes that homeowners face.
Knowing how many years should a well pump last is important because it can be a signal that it's time for a new piece of equipment. With proper well maintenance, your new well pump can last, on average, 8 to 15 years, though many homeowners report their pumps lasting far longer, often between 20 and 30 years!
Water pump short cycling (rapidly turning on and off) is usually caused by a loss of air pressure in the pressure tank, a faulty pressure switch, or a blocked water filter. This constant stopping and starting will quickly burn out your pump motor.
A pressure switch that rapidly clicks on and off (called "short cycling") is most often caused by a waterlogged pressure tank (loss of air) or a leak in your plumbing system. This continuous on-and-off action rapidly overheats and can permanently burn out your pump motor.
What is Average? The water industry estimates that an average person uses 3,000 gallons of water monthly, so a family of 4 would use 12,000 gallons for bathing, cooking, washing, recreation and watering. But a lot of factors come into play when calculating average use.
A 30/50 PSI pressure switch turns the pump on at 30 PSI and off at 50 PSI. A 40/60 PSI switch keeps the system at a higher pressure, turning on at 40 PSI and off at 60 PSI. Both maintain the same 20 PSI operational gap to prevent the pump from rapidly short-cycling.
The average household requires a water flow rate of 6 to 12 gallons per minute (GPM) to comfortably run daily activities like showering, cooking, and laundry without experiencing noticeable drops in water pressure.
Resetting a well pump pressure switch usually involves holding the manual "Start" lever or clearing debris from the electrical contacts. If your pressure drops to zero, the switch will trip to protect the pump from running dry. Always wear protective gear and use caution around live electrical components.
Testing a well pump without pulling it involves isolating whether the issue is electrical or mechanical. First, check for tripped breakers and verify the system is receiving the correct voltage at the pressure switch. Next, test the wire resistance with a multimeter and check the amperage using a clamp meter.
A well pressure switch typically lasts 10 to 15 years. However, its lifespan can be significantly shortened by electrical surges, poor water quality (sediment or mineral buildup), or a failing pressure tank that causes the switch to click on and off too rapidly.
Early signs of a failing water pump include visible coolant leaks, a high-pitched whining or grinding noise from the front of the engine, a slow but steady drop in the coolant reservoir, and an engine temperature gauge that occasionally creeps higher than normal.
Hire a plumber when the issue involves in-house plumbing or a shallow well with a surface jet pump. For complex problems, submersible pumps, outdoor well equipment, and specialized testing, a well contractor is the better fit due to equipment, deep-well access, and diagnostics.
A well pump that rapidly turns on and off (known as "short cycling") is almost always caused by a waterlogged pressure tank or a loss of air pressure within it. When the air cushion fails, there is no buffer to hold pressure, causing the pump to cycle repeatedly.