The error code HE1 (HE, HE2, HE3, Hr) on the display of the washing machine indicates a problem with the heating element.
A direct proof of this is the absence of indication of this error when washing in cold water on any program.
If the temperature is set to 40 degrees or higher, this error code appears on the display and the program stops working.
Unfortunately, the problem with the heating element cannot be eliminated by the owner himself. Therefore, if you notice one of the errors above, you will be required to address the serviceman to fix the malfunction.