water was not going to the barrel

first I thought there is a problem with with hoses.problems like filter or hoses blocked.after I opened the hoses they were fine .Water was going out with power .Then I opened the valve connected to the hoses . I checked these hoses withe help of a 12 volt battery . the valve was not opening so I came to the conclusion that this part is broke.is not easy to change this part.Small place and hard to unlock the hose inside .They could design this much easier with just using longer hose.But I think then nobody will call service dept.