Hi all, Started to get MH ready for the new season. I left locker internal doors open to let air circulate, when I closed them they would not catch. I thought it might be because the van as stood up for some time or that it was due to the cold weather. Gave the MH a hour run + had heating on for three hours. Lookers still would not lock . Has any one had this problem. Its a Swift 2015 van. Thanks in advance. John.