There is a 'tech sheet' in the back pf the dryer. Unplug machine, Remove the access panel on the back to get to it. Reach in and it should be there. It will tell you how to do a button check. You have to enter a test mode through the buttons.
The E 61 is a stuck button.
Enter function test mode and perform key
stuck closed (active). (button) test to determine which button is at
fault. Carefully free the and perform the test
again. If button is free but the key struck code
still exists, replace electronic control.
If you need further help, I’m available over the phone at
https://www.6ya.com/expert/craig_3fa289bf857b1a3c