Now I am trying to lower the heat level on the heated tube to see if that helps. It came with the heat level set to 5, which is the highest. But my bedroom never really gets cold, so I tried lowering to 2 and then to 1. When I wake up in the morning, I can feel the tube is really hot and I see the machine reverted to a 5 setting on its own.
How can I override this and set the tube temperature manually?
I have a Respironics BiPaP Auto 60 series with a System One humidifier.