Dear customer,

Could you confirm if your water valve and your power adapter is 24VAC? Not DC.

When that zone is watering and you cannot stop it with your Netro app, please unplug the power adapter of Netro sprite, see if the zone is still watering.  If unplug the power adapter, the zone is still watering, this zone valve need to be checked. 

Thanks,

Wency

Netro Support