I have 1 zone that works with the old controller but does not work with the Rachio 3 any suggestions
Confirm that the zone waters when you operate the valve manually.
Confirm that the wire for that zone is properly inserted. If its common wire is separate from other zones, check that it is properly connected.
If you have a meter, check voltage between the zone output and common, when the zone should be running. If there is none, the zone output may be defective, try a spare zone if you have one. If ~24 VAC is present, check it at the valve. If it’s good there, too, the solenoid has likely gone bad.