Forums on the internet in general are self-centered. Don't feel as if your thoughts exclude ECF from that generalization, it's just not "as" self-centered as some of the others and may take time for someone who thinks they know what to do in your situation to pipe up.
I'll help you, though.
First-off, who made it and what does it resemble? Is it an official pass
through in regards to a certain brand?
Pass
throughs are like anything else electronic, really. They can last two days, two weeks, two months, two years, who knows. It all depends on the quality of manufacturing, build and what sort of passthrough it is. It could be the automatic sensor, possibly a direct-drip might have burned it out or shorted it somehow.
Any manner of things could've happened.
Personally, I use electronicstix's manual passthrough. It's fallen off my computer desk and hit the floor more than anything else has and that's a feat in and of itself considering how clumsy I am. The threads are holding up well and the button hardly ever misfires. If that's a suggestion to you then take it as one but do note that it is a 5v passthrough and will require its own power source.