The H2 error code refers to a possible overheating situation.
I have tried to find a video on where to locate the heating source.
Since there wasn't one I'm sharing this one with you.
(unplug the unit from electrical outlet)
1- remove filter housing
2- remove ( 2 ) torx t-8 screws on on each side of for the " loop amplifier "
the tower where air blows from
3- gentle give a twist to remove the loop amplifier, be careful there are wires connected.
4- lay loop amplifier down and blow the inside, be sure to blow the heading elements.
5 - reverse the steps to reassemble.
good luck.
if you need to try some other ways read this article I found from
HeaterTips
https://heatertips.com/dyson-h2-error...