Rain Bird RC‑7BI: Manual Zone Advance Works but Auto Start Fails

The controller’s clock runs and manual zone advance waters correctly, but programmed start times don’t trigger watering.

Diagnosis

The controller has separate motors for timekeeping and zone advancement. The auto‑start switches (under the day wheel, time wheel, and auto/off lever) are likely worn or faulty.

Recommendation

Since the RC‑7BI is discontinued and parts are scarce, replace it with a modern controller such as the Rain Bird ESP series or Irritrol Rain Dial series.