Hot water heating system,boiler not turning off,all 4 jones set to lowest, but all still hot and circulating

One pump with four zone valves, or four separate pumps?

Thanks, I have found the problem,2 zone valves were stuck open,helped the spring by pushing on the big gear with small screwdriver and putting some moveit(oil) on the valve shaft and moving back and forth.works for now I will change the zone valves in summer time

Thanks for the update.