About 7 years old (yeah, I know - I got my money's worth.) I'm not worried getting a new one - it's the long process without a working one that concerns me. Can't even get into the ENT until Thursday and because my prescription is old, I'll probably have to go through the sleep test again.

Hello friends - I'm using an older GoodKnight 425 bipap. Suddenly, every 20 minutes, it ramps down and the stream of air is weakened. Sort of like the opposite of the ramp up feature, only it isn't gradual - the unit suddenly drops our of warp. I can turn it off and back on again and it corrects the...