I'm waiting to hear what the problem was. At this point it would be foolish to go any further with speculation when you can simply take the block apart. If there's no obvious problems with the block then the question would arise of what else could it be. For example, if the spool moves freely, the springs and o-rings are intact and there is no fluid present around the switch assembly I would be skeptical if there was any problem with the block. The only other thing would be a crack which you could check with a crack check spray. Take a look at the picture of the block and tell me how the block could cause the symptoms?
