Rain Bird 9-Zone with Richdel Valves: Only Zone 6 Runs After Heavy Rain

9-zone Rain Bird controller, Richdel valves. After heavy rain, only Zone 6 runs (not programmed). Suspect rain damage.

Likely Cause

Common wire disconnected. Rain sensor? Check if installed — prevents watering when wet.

Checks

1. Rain sensor installed? Bypass if wet
2. Controller COM terminal: white wire secure?
3. All valve solenoids: common wire connected?
4. Zone wires secure at controller and valves?

Why Only Zone 6?

Zone 6 wire may be only one making contact on common if common is loose. Or Zone 6 solenoid failed shorted.