Hello everyone,
I wanted to share that I recently came across this same issue. This page is the top result for this error code and model number on Google, so!
I called a technician and the error code has to be suspended to allow the dryer to work again. Your machine could possibly be damaged because it overheated, though, so do this at your own risk.
(I am Dutch, so there might be slight differences in our machines. I’ll try to make the explanation work regardless of language)
1: Turn the machine on (HE code appears).
2: Turn the machine off.
3: The display should have four buttons inlaid in it. Press and hold the middle two buttons!
4: Turn the machine on. (HE code is now gone, all lights on the display are burning)
5: Release the buttons you were holding.
6: Turn off and on one more time.
7: Your machine should now be working again!
If your dryer still won’t work, the overheating has caused permanent damage to your machine and will need replacement parts. (or be replaced entirely)
Best of luck!