The Remote Control is of EPTO type and the problem I have is that the Lock Button is stucked into some kind of ? position and the lever is really difficult to maneuver. It seem to me there is a tighten screw with a kind of locking mechanism that cause the problem. There is absolutely no way to directly access the screw with a screwdriver since it is half way hidden between the lever and the unit box. Seem like I have to remove the Control lever but it is difficult to see how to do it even though I have opened up the control box. Any help from this forum about how to proceed is highly appreciated.