Quick answer: A failing irrigation solenoid can cause a zone not to open, operate intermittently, buzz, or fail electrical testing. Because similar symptoms can come from wiring or the valve itself, the solenoid should be tested rather than replaced solely on symptoms.
Common solenoid symptoms
- One zone will not run while other zones work
- Buzzing or humming at the valve
- Intermittent zone operation
- Abnormal resistance or an open circuit during electrical testing
- Valve operates manually but not from the controller
Solenoid, wiring or valve?
The controller sends low-voltage power through field wiring to the solenoid. A broken wire, corroded splice or controller-output problem can therefore look like a failed solenoid. A mechanically stuck valve can also remain closed even when the solenoid is energized.
When repair makes sense
A solenoid can often be replaced without replacing the complete valve when the valve body and internal components remain serviceable. See our valve repair service and wire tracing and valve locating.
