Well Pump Control Box Repair in NC
On 3-wire submersible pumps, the control box on the wall holds the capacitor and starting relay. When it fails, the pump hums but never starts.
A well pump control box is the small enclosure (usually mounted near the pressure tank) that holds the starting capacitor, run capacitor, and relay for a 3-wire submersible pump. When a capacitor fails, the pump motor hums but cannot start — and a humming, stalled motor will burn itself out in minutes. Control box repair is one of the higher-value fixes on a well system: replacing a $40 capacitor often saves a $2,000 pump.
What our team handles on the call
- Diagnose 3-wire control boxes (Franklin, Goulds, etc.)
- Test and replace failed start capacitors
- Test and replace failed run capacitors
- Replace start relays and overload protectors
- Replace the full control box when components have all aged
- Re-wire to current code
How a service call works
- 1Free phone diagnosis
We walk through symptoms, water pressure, sounds, and system age to narrow the problem before we roll a truck.
- 2On-site test
We check voltage at the pressure switch, draw amps on the pump, and verify pressure tank pre-charge before opening anything.
- 3Written estimate
You see the recommended scope, repair vs replacement, parts, and labor in writing before any work begins.
- 4Repair or replacement
We carry common pumps, tanks, switches, and check valves on the truck so most no-water calls finish the same day they started.
- 5System test and follow-up
We cycle the system, confirm pressure holds, shock-chlorinate when needed, and stand behind the work with a labor warranty.
What does it cost?
Capacitor replacements run $200–$400. Full control box replacements (for older boxes where multiple components have aged) run $350–$700 including parts and labor.
- •Single capacitor replacement: $200–$400
- •Capacitor + relay replacement: $300–$550
- •Full control box swap (Franklin / Goulds): $350–$700
- •Saves a $1,500–$3,500 pump replacement when caught in time
Every job gets a written, on-site estimate before any work begins. No surprise fees.
Where we work
We service 3-wire submersible control boxes across the Piedmont Triad. Common Franklin and Goulds capacitors stocked on the truck.
Frequently asked
How do I know if my control box is bad?
The classic symptom is a pump that hums for a second or two but never starts, then trips the breaker or the overload. A bulged capacitor (visible if you open the box) is a dead giveaway.
Do all well pumps have a control box?
No. Only 3-wire submersible pumps need an external control box. 2-wire submersibles have the starting components built into the motor inside the well.
Can I just replace the capacitor myself?
Capacitors hold a charge even when the power is off — discharge incorrectly and you get a serious shock. Most homeowners call us. It is a 30–45 minute job and we test the rest of the box while we are there.
Will the capacitor going bad damage the pump?
Yes, if you let it keep trying to start. A humming, stalled motor burns out fast. That is why a $40 capacitor caught early saves a $2,000 pump.
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.
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.
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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.