I've read the manual where it's supposed to blow to clear out any residual moisture in the tube and then shut off after 30 minutes or so, but I have let it blow for up to 4 hours waiting for it to shut off automatically and it never does.
I spoke to my therapist about it and she had to look it up in the manual before agreeing with me that it should stop after 30 minutes. Then she told me, "There can't be anything wrong with it. It's a brand new machine."

I don't quite know what to do. I can't seem to find any way to ask Resmed directly about it. I don't have a lot of confidence in a machine that doesn't seem to be working correctly.
Am I missing something? Is it supposed to be doing this? Should I talk to the therapist's manager if I can't get adequate service from her?
Thanks for listening,
Gina