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Why Your Rain Bird ESP-6 Controller Blows a Fuse on Zone 5

Diagnosing a Blown Fuse on Zone 5

When a Rain Bird ESP-6 controller repeatedly blows its fuse as zone 5 activates, the culprit is almost always the solenoid on that zone's valve. A shorted solenoid draws excessive current, triggering the controller's protection.

Test Procedure

Locate the zone 5 valve and disconnect its two wires.
Run the controller through its cycle. If the fuse holds, the solenoid is defective.
Measure the solenoid's resistance with an ohmmeter; a healthy reading is typically 25–50 ohms.

Repair

Replace the faulty solenoid. Most valves allow solenoid replacement without removing the entire valve body. After installation, reconnect the wires and test the zone again.

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