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Spent a full day chasing a phantom door lock fault in a 90s Otis. The sensor was fine. The wiring was fine. A pigeon had built a nest in the shaft and the feathers were tripping the beam.
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the_anthony1mo ago
It's funny how often the real problem is just nature getting in the way of our machines. You can spend hours checking every technical part, only to find a leaf, a bug, or a bird's nest. The world doesn't care about our systems. It reminds me of fixing a computer only to find a pet hair jammed in the fan. We build these perfect, logical boxes, and then the messy outside world finds a way in.
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chen.adam1mo ago
Always check the hoistway first now. I learned that lesson the hard way after a similar call. You can waste a whole shift on perfect circuits when the issue is just debris in the path. Keep a small vacuum in your tool bag for dust and feathers. It saves so much time to just clear the area before you even break out the meter.
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