Welcome! I don't have an answer to your question, but here's a short video to help you figure out the run hours on your machine: https://www.youtube.com/watch?v=b1nLuUmiasA Thank you for that video link! I was able to check the hours. It shows 6406 hours, so it sounds like it was new when I got it.

Sounds like the elbow that connects the hose to the mask, it has two flaps valves in it. have you ever replaced that part? https://www.thecpapshop.com/airfit-f20-elbow Yes. I get a new elbow every 6 months with the full mask kit. I replaced that part yesterday with everything else, but it didn't ch...

First post, so please forgive me any etiquette errors. I have a Resmed AirSense 10 APAP machine with the climate-controlled hose and onboard heated humidifier and the AirTouch F20 full-face mask in a medium size. I got it in March of 2020, but it was a rental from the DME company so I have no idea h...