I had my gear serviced just before i went on a dive trip. & I specifically told the technician my inflator button is sticking a bit, as it happened on a day trip i did, a few days before in preparation for my sardine run in Pescador Island.
During my very first dive on said trip. The button stuck while im at depth, it wouldnt budge, pumping air sooo fast into my wing, i went up! Good, I didnt panic.. dumped air, swam down & disengaged the hose fr the inflator.
Back at the dive shop, the manager/technician took apart my inflator & saw dirt inside & a part of the o-ring out of its groove! I took a picture of it as evidence before he fixed it for me.
Im sooo disappointed w/ the shop who serviced my gears. When i told them what happened & showed them the pics, all they can say is sorry. & they returned the service fee they charged me.
Now Im scared to have my dive gears serviced. What if something more like this happen? Or God forbid, anything worse?? Can i learn how to clean & service my own gears?
The lesson to be learned here is to never get gear serviced then go on vacation. Over the years on this board a general trend has emerged. That is, rapid, major gear failures (major freeflows and the like) almost always happen shortly after service, not after a long time in service. Creeping IP pressures and slight freeflows are pretty much the "normal" problems that pop up after long intervals between services, both fall into the PITA catagory. Get your gear service by a good tech but then do several easy test dive locally before heading off to a remote or advanced dive site.
Learning to do your own gear is not difficult for the mechanically inclined. If you can do brakes and small engine carbs you can do regs. The first step is to learn how they work. I recommend getting both of these 2 books as a starting place. "Regualtor Savvy" by Peter Wolfinger Regulator Savvy (Spiral Bound) and "Scuba Regulator Maintenance And Repair" by Vance Harlow SCUBA REGULATOR MAINTENANCE AND REPAIR by Vance Harlow
They will give you the background you need to start learning reg repair. Then get yourself an old junk reg to tear apart, clean, lube and adjust.