Rain Bird ESP-8TM Stuck in 4-Minute Test Mode

Symptom: Every Zone Runs Exactly 4 Minutes

The blinking “4” counting down is the hallmark of the controller’s built-in test program. The test program overrides regular run times and limits each zone to a short, fixed duration (often 1–10 minutes, default 4).

How to Exit Test Mode

1. Consult the ESP-8TM manual (available at Rain Bird’s site) for the exact dial position labeled “Test” or “System Test.”
2. Rotate the selector dial through all positions several times—fast, slow, both directions. This can free a sticky mechanical switch.
3. Power-cycle the controller: unplug the transformer, remove the 9 V backup battery, wait overnight, then reconnect and reprogram.

If It Persists

The controller’s logic board is likely faulty. Replace the ESP-8TM with a current model (e.g., ESP-TM2 or ESP-Me) for reliable operation.