I just installed a MS-OPS2 occupancy switching switch. It is sticking on and not switchable. A thread from 2013 said the following:
") What happened when you first turned it on:a. Did the product work one time, but now it’s stuck? In other words, were the lights turned off at first, but you were able to turn them on, and now they are stuck on? This indicates that the device is switching the neutral.b. Is the switch stuck in the off position? This may mean that the sensor does not have a good ground connection. Keep in mind, this may also mean that the unit was damaged upon installation – make sure that power is turned off at the breaker during installation and that you are only connecting it to the wires that were connected to the original switch."
Sadly this does not apply. My ground is good, the voltage from the hot lead to ground is 120V, I have tried switching the switch leg wires to see if that made any difference. It didn't. So I am out of options unless you can suggest one.