Hunter Hydrawise "High Solenoid Current" Alert: What It Means and How to Troubleshoot It

A Hunter Hydrawise High Solenoid Current alert is an electrical zone-circuit fault alert, not a plumbing or scheduling problem. The controller detected excessive current on the wiring to a zone valve and automatically turned that zone off. Hunter's usual causes are a wiring short or a bad solenoid. To isolate the fault, remove the affected zone wire from its terminal and manually run the zone; if the alert clears, inspect the field wiring and the valve solenoid - including corroded splices and poor solenoid connections. On systems with a pump or master valve, also remove the P/MV wire. If the alert appears on every zone, suspect the pump connections, the master-valve wiring or solenoid, or the common wire. And do not chase one universal current cutoff: Hunter's own pages conflict on the Pro-HC threshold (900 mA vs. 850 mA), so confirm the figure for your specific controller.

What the High Solenoid Current alert means

When a Hydrawise controller reports a High Solenoid Current alert, it has detected excessive current in the wiring to a zone valve and has automatically turned that zone off. The alert describes an electrical fault on the zone circuit - it does not by itself indicate a broken pipe, a bad spray head, or a problem with your irrigation schedule.

Hunter identifies the usual causes of this overcurrent condition as a wiring short or a bad solenoid. Because the fault is electrical, a wiring-related overcurrent can also cause the controller to reboot. A reboot that occurs alongside this alert may indicate the same underlying wiring fault rather than a controller defect.

Why there is no single universal current cutoff

It is reasonable to want one number - the current level that trips the alert. Hunter does not publish a single consistent threshold, so this article deliberately does not state one.

What Hunter does publish are typical operating draw figures. A solenoid normally draws roughly 200–400 mA, and about 300–500 mA when a master valve is included in the circuit. These are typical draw figures, not a trip point: they describe normal current, not the level at which the alert triggers.

Hunter's own support pages conflict on the Pro-HC threshold. The Global Alerts page lists Pro-HC at 900 mA, while the High/Low Current page lists PHC at 850 mA. Because two authoritative Hunter pages give different numbers, verify the threshold in the documentation for your specific controller instead of relying on a universal cutoff, and treat either published figure as applying only to the controller model it specifies.

Hunter's isolation sequence

Hunter's published troubleshooting for this alert is an isolation test performed at the controller. Work through the steps in order:

1. Remove the affected zone wire from its terminal at the controller.
2. Manually run that zone.
3. Observe whether the High Solenoid Current alert clears.

If removing the zone wire clears the alert, Hunter directs you to inspect the field wiring and the valve solenoid. In particular, look for corroded splices and poor solenoid connections. In other words, a cleared alert points to that zone's field wiring or valve rather than to the controller, while an alert that persists with the zone wire removed has not yet been isolated, so the remaining shared wiring should be checked before the controller itself is suspected.

For systems that use a pump or master valve, Hunter adds one further step: also remove the P/MV wire. This helps isolate whether the pump or master-valve circuit is what causes the alert.

If the alert appears on every zone

A single-zone alert points to that zone's wiring or solenoid. When the overcurrent alert appears on every zone, the likely fault is something the zones share. Hunter identifies the shared suspects as:

• the pump connections,
• the master-valve wiring or its solenoid, and
• the common wire.

At this stage, diagnosis shifts away from individual zone circuits and toward these shared components. This article does not extend into disassembly or replacement steps.

Related sprinkler troubleshooting

• Hunter irrigation guides - brand-specific help for Hydrawise controllers, valves, and accessories.
• Sprinkler controller troubleshooting - broader help with controller alerts, wiring, and setup.
• Irrigation valve troubleshooting - zone valve and solenoid basics.
• Sprinkler zone won't turn off - a different zone-behavior problem that is sometimes confused with electrical faults.
• All sprinkler troubleshooting - the full topic index.