My issue was the hose was defective. I had switched to older hoses(that I had fortunately kept) but he gave same error message: "ClimateLine error. Therapy may run without heating." so I assumed that hose wasn't the issue as 3 hoses gave that message. Unplugged Resmed11 for a bit, plugged in with an old hose, now all works again.
tried all settings auto manual etc. for tube temp. trying manual for humidity tonight (it's always been on auto)
After 1year 2 months with Resmed 11:
-the water chamber doesn't heat at all, BUT does with 'warm up' setting then stops during use.
-climateline air heated tube no longer heats at all with any settings.
Supply co says they send it back and resmed 'deems' if it is user error or their machine and can take 4-6 weeks leaving one without a machine.