Just realized a bad door operator sensor in a 90s Otis unit can eat up a whole Tuesday

I spent 6 hours chasing a phantom 'door open' fault in a 1994 Otis Gen2, only to find the sensor was just dirty, but my partner says we should have just swapped the whole operator first and saved the time.

3 comments

3 Comments

carr.abby17d ago

Remember a job where the main board kept throwing weird codes, and we replaced literally everything in the machine room except the button panel. Turns out some kid had jammed a wad of gum in the hall call button, holding it down just enough to mess with the system. The fix took two minutes, but the hunt wasted a whole day.

brooke_taylor4417d ago

Tell me about it, wasted a whole afternoon on a sticky relay last month.

wren23017d ago

That old sensor cleaning debate is a classic. My old boss used to make us swap every part in the cabinet before even looking at the door, which felt backwards. Ended up with a pile of good boards and a simple wiring fault more than once. Just creates extra work and a bigger parts order for no real reason.