Well Pump Short Cycling: Causes, Fixes, and Costs
A guide to well pump short cycling. Why it happens, how it damages the pump, and what a homeowner can check before calling a well contractor.
Well pump short cycling is when the pump turns on and off every few seconds instead of running for a minute or more. It is usually caused by a waterlogged pressure tank, a failed tank bladder, or a pressure switch set too close together. Short cycling is hard on the pump motor because starting current is higher than running current, and every start puts wear on the impeller and motor bearings. If the pump is short cycling, the tank is the first thing to check.
What our team handles on the call
- Diagnose whether the tank, switch, or pump is causing short cycling
- Replace waterlogged or failed pressure tanks
- Adjust or replace the pressure switch
- Check pump amperage to confirm the motor is not already damaged
- Repair or replace the pump if short cycling has worn it out
- Set the system pressure so the pump runs longer cycles
How a service call works
- 1Check the pressure gauge
Watch the gauge. If the pressure rises and falls rapidly while the pump clicks on and off, short cycling is happening.
- 2Tap the tank
A healthy tank sounds hollow at the top and solid at the bottom. If it sounds heavy all over, the bladder is failed and the tank is waterlogged.
- 3Check the pressure switch
We verify the cut-in and cut-out settings and inspect the contacts for pitting. A switch set too close together can cause rapid cycling.
- 4Replace the failed part
We replace the tank or switch as needed, set the correct pre-charge, and check pump amperage to confirm the motor is still healthy.
What does it cost?
The cost to stop well pump short cycling in central NC depends on the cause. A pressure switch adjustment or replacement is typically $400 to $700. A pressure tank replacement is $600 to $1,400. If short cycling has already damaged the pump, repair or replacement ranges from $400 to $3,500. We diagnose the cause for free on-site.
- •Pressure switch repair: $400 – $700
- •Pressure tank replacement: $600 – $1,400
- •Pump repair or replacement: $400 – $3,500
- •Free on-site diagnosis and written estimate
- •Same-day service across the Triad
Every job gets a written, on-site estimate before any work begins. No surprise fees.
Where we work
We repair short-cycling well pumps across the Piedmont Triad, including Greensboro, Winston-Salem, Burlington, High Point, Asheboro, Chapel Hill, and Kernersville.
Frequently asked
What causes a well pump to short cycle?
The most common cause is a waterlogged pressure tank that has lost its air charge. A failed tank bladder, a pressure switch set too close together, or a slow-filling well can also cause short cycling. The result is that the pump starts and stops every few seconds, which overheats the motor.
Is short cycling bad for a well pump?
Yes. Starting the pump draws more current than running it, and each start puts mechanical stress on the motor and impeller. A pump that short cycles can wear out in months instead of years. Fixing the tank or switch early is much cheaper than replacing the pump.
How much does it cost to fix well pump short cycling?
A pressure switch adjustment or replacement is typically $400 to $700. A pressure tank replacement is $600 to $1,400. If the pump itself is damaged, repair or replacement runs $400 to $3,500. The exact cause is diagnosed on-site for free.
Can you come out the same day?
Yes. No-water calls get same-day priority across the Piedmont Triad and our phone is answered 24/7. Most emergency calls are reached on-site within a couple of hours of the first call.
Do you warranty the work?
Yes. You get the full manufacturer warranty on the pump or tank plus our own labor warranty on the install. We answer the phone after the job is done.
More reading
Need help right now?
We answer the phone 24/7. Most calls are reached on-site within a couple of hours.
Call (336) 273-7314Or send a message and we will get back to you.