I am an engineer/technician/electrician/tinkerer; can I repair my own unit?
We do not recommend "tinkering" with your unit. All major manufacturers (Inogen, Respironics, Caire, Invacare) are pretty strict that if you try to fix the unit yourself, you will invalidate the warranty. You MAY be able to fix something yourself but we routinely have disappointed customers when the manufacturer refuses to fix something under warranty because the unit has been tinkered with.
The exception to this rule is that the sieve beds on the Inogen family of POCs are self-replacable.