slow down input occurring at the wrong time. hmmm. you have the tool, how about a new hoistway scan? have you tugged on the limit switch connections? some are notorious for breaking right at the crimp point (TSL is famous for this). Or, where the wires are fed through the switch base into the unistrut stick, found breaks there too. Boa makes a good point also. Hey, I've seen one where with the switch cover on...contact trouble. Cover off...no trouble...go figure.
