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Sprinkler System Runs Randomly After Controller Replacement

An irrigation system cycles randomly through all zones. Replacing the controller didn't resolve the issue.

Programming Check

Most controllers support multiple programs (A, B, C) and multiple start times per program. Verify that only one program is active with a single start time. Check each program for overlapping start times, station run times, and watering days. Eliminate any unintended duplicate schedules.

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