That one time a loose screw on a panel cost me a full afternoon

Last month I was swapping out an old DSC panel at a house in Tacoma and kept getting a random zone fault on the back door. Spent like 2 hours checking wiring and even replaced the sensor. Turns out it was just a tiny screw inside the panel that had backed out and was touching the terminal strip. I felt pretty dumb but now I always give the board a quick once over before I dig into troubleshooting. Has anyone else had a weird little thing like that eat up your time?

2 comments

2 Comments

xena_williams9d ago

See, I actually disagree a bit here. Loose screws inside panels are way more common than people think, especially on older DSC cans where the plastic gets brittle. I had a 1616 once where a screw from the keypad terminal cover fell out and landed right across the battery positive and a zone input. That took me an afternoon too because it only faulted when the furnace kicked on and vibrated the wall. You'd be surprised how often a stray screw or even a little piece of wire clippings can mess with things inside those metal boxes. So yeah, it's not just bad connections, sometimes the hardware itself decides to get in on the action.

the_wendy9d ago

Wait, you mean a loose screw that wasn't even part of the sensor or wiring was causing the false alarm? That's wild, I've never had a screw do that before, just bad connections usually. I guess it makes sense if it's vibrating enough to touch the terminals but man what a waste of time.