Thinking we may have a handle on this one. Yes ... I replaced magnates at floors 2 & 3 including slow down mags. Replaced selector card and guides. Checked wiring.
ST on job 10 hours without failure. Less than 2 hours after leaving had another fail ..FLRP.
The equipment room temperature may be part of the problem on this one. Temp was quite warm when I arrived at the job....but car was running. Small equipment room and no air flow. My entering and repeatedly in/out of room allowed enough air to prevent problem.
Mounting a digital thermometer in room.
I will update when I have more/ better information on.