Rain Bird ESP-16LX+ Tripping House Breaker: Transformer Fault Diagnosis

ESP-16LX+ Blows 15 A House Fuse After 15–60 Minutes

The controller itself runs on 24 VAC; only the transformer connects to 120 VAC. A delayed house‑breaker trip indicates a transformer fault (shorting internally after heating).

Fix

1. Open the ESP’s lower junction box and verify all 120 VAC connections are tight, especially the ground (green) wire.
2. If connections are good, replace the transformer (input 120 VAC, output 24 VAC). Available at Rain Bird dealers or electrical supply houses.