Hey there, hope you solved your issues. I had similar so your post was useful in troubleshooting. I believe I have a solution.
Same rough problem as yours: tubing was working, then a night of no heat and huge rainout as a result. As I was trying to troubleshoot I noticed my Airsense 11 reporting that the Climateline 11 was connected but intermittently, as if was being plugged in and out of the unit.
This also resulted in tube heat settings not appearing in the user menus, likely due to the unit thinking a generic tube had been put in place of the powered Climateline.
I saw some other posts about Climateline being finicky with travel inverters and batteries. I remembered that I had installed a power bar of sorts for extra outlets, one of those big wall warts with four outlets and some USB ports to charge everything at once.
Sure enough if my Airsense 11 was plugged in directly to my wall socket with the splitter removed the intermittent “Climateline connected” issue went away and tube heat settings returned to the user menu.
I just did this now - haven't had a chance to test to see if the issues start again - but I think this will solve it. If this tube starts acting up again I’ll post here.
I thought about how a hair dryer will sometimes flicker the lights in my house when it’s turned on high heat and wondered if the draw of a CPAP/humidifier/heated tube would be higher than I expected. Electrically inclined users can check my work but I think the combo just overwhelms cheap socket solutions like mine resulting in power draw issues not reported by the Airsense. Some in-home real world QA from ResMed might have shown an environmental cause.
