Thanks for your response!!

I do not have IMS, regrettably, and the elevator was installed and has been running ok since 2011ish. Do you still feel like sensor placement might be at fault - is that something that becomes an issue after a few years of normal operation?

Although I didn’t notice any guide liner chunks in the pit, I’ll check the rail guides and make sure it hasn’t eaten a liner and leaned toward a sensor enough to create a problem such as you describe.