I have a hunter pro-c system with 6 stations. Nothing fancy, start time is 5:30am every other day, run time 5 mins each station. Everything worked great up till a week ago. When I manually start all stations, station 1 will not start( everything runs normal on controller, just no water coming out of sprinkler heads) all other stations operate normal. When I turn pump 1 on then off then on again than manually start all stations it works fine! I have to cycle pump 1 on and off than back on every time to get station 1 to operate.