Yea I had actually unplugged the heating elements and set it to heat and still sometimes got that H2 error, which means its not from overheating... since it literally wasn't heating up then :(

Hey, thanks for posting this. I used it as a general guide for my Dyson AM01 which also was throwing an error when using the heat function. Opened it up expecting to find and least some dust on the heating elements… and to my surprise and annoyance they were basically clean.

Any thoughts or other ideas? Not sure if there is a temp sensor incorrectly reporting the temperature of the heating elements that I can try to replace?

Thanks