Sprinkler pump not working
Many sprinkler systems in South Florida take their water from a shallow well, a lake or a canal through their own pump. When the heads stay dry, what the pump is doing tells you where to look.
Start with what the pump does
| What you notice | Where the fault usually is | Safe to check yourself |
|---|---|---|
| Nothing happens, no sound | No power reaching the motor: a tripped breaker, the pump start relay not closing, or the controller not set to start the pump for that zone | The breaker and the controller settings |
| The motor hums but does not spin | A failed start capacitor, low voltage or a seized motor | No. Switch it off: repeated attempts overheat the motor |
| It runs but little or no water comes out | The pump lost its prime, a leaking foot or check valve, a blocked suction line, or a low water level in the well or canal | Whether the pump is full of water, with the power off |
| It starts and stops by itself | A leak in the system, a faulty pressure switch, or the pump running against closed valves | Look for wet spots and broken heads while it runs |
| It trips the breaker | A short in the motor or the wiring, often with water in the pump or relay box | No. Leave the breaker off and call |
What you can check without opening anything
Look at the breaker that feeds the pump first. If it has tripped once, you can reset it one time. If it trips again, leave it off: something is shorting and resetting it again can burn the motor.
Then go to the controller. Run one zone by hand from the controller. Most controllers have a pump or master valve setting per zone, and if it is switched off for that zone the pump never gets the signal. A rain sensor or a rain delay can also hold the whole system off, which looks exactly like a dead pump.
If the pump runs, listen and look. A pump that runs for minutes without moving water is usually running dry, and that damages the seal quickly. Turn it off and do not keep trying.
Why a pump problem is often an electrical problem
On most home systems the controller does not power the pump directly. It sends a low voltage signal to a pump start relay, and the relay switches the full voltage to the motor. The fault can be in the controller, the relay, the wiring between them, the capacitor or the motor windings, and none of those look any different from the outside.
That is why the diagnosis at Exsolares starts with measurements, not with a new pump. The owner is an electrical engineer with a master's in Irrigation and Drainage and more than 20 years of field work, so the hydraulic side and the electrical side are checked in the same visit.
Repair or replace
A relay or a capacitor is a small repair. A motor with burned windings, a cracked housing or a pump that was undersized for the system from the start is a different conversation. Before replacing anything we check the flow and the pressure the system actually needs, so the new pump is not the same mistake again.
Sprinkler pumps and pumping stations
Pump diagnosis, installation and maintenance, with the hydraulic and electrical systems considered together.
Common questions
Why does my sprinkler pump keep losing prime?+
Usually air is getting into the suction side: a leaking foot valve or check valve, a loose fitting or a cracked suction pipe. It can also happen when the water level in the well or canal drops during the dry season.
Can I run my sprinkler pump without water to test it?+
No. Running dry heats and damages the mechanical seal within minutes. If the pump runs and no water comes out, switch it off.
Do you work on well pumps and canal pumps for sprinklers?+
Yes. We diagnose, repair and install irrigation pumps for homes, communities and commercial properties in Miami-Dade and Broward, including the relay, controls and wiring.
Start with an assessment of your irrigation.
An existing fault or a new installation. Tell us what you need and where the property is.