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Spent 4 hours chasing a phantom door lock fault in Chicago
Got a call on a Otis elevator in a Loop building last Tuesday. Doors would refuse to close every 20th cycle or so. Checked the interlocks, the rollers, the gate switch. Turned out to be a worn solder joint on the logic board inside the controller. Cost me half a shift before I spotted it with a magnifying glass. Has anyone else had a hidden solder crack eat up their afternoon?
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robert_roberts1mo agoMost Upvoted
Man that's brutal, I feel your pain. @abbychen that thermal camera trick is wild, never would have thought to use one for a solder joint.
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