Soundbear

My ramp time on my Airsense 10 was set to 15 minutes at 6 then all of a sudden it just started giving me 6 when I got in bed. So I switched it over to Automatic and it does the same thing. Two weeks ago I took it in to my supplier(the machine was given to me in Oct 18, so its been used 5 months) for doing the same thing, ramping up to 6 right away. My supplier switched it to manual for 15 minutes and it worked fine for a week, now its going back to ramping to 6 the minute I turn the machine on. I have disconnected the power for a few seconds but still does same thing. I believe the sensor is bad. This started Friday night two days ago and I'm going to take it in for another machine on Monday unless I get some answers.