ugly pcs -
on your comment which brand are you talking about? I have a Kenmore
WDF530PAYB6 I had a bad heating element. Replace it and the high limit thermostat, and still had no heat. I then found Service sheet W10580720A. It read that a diagnostic mode needed ran to turn the element back on. Diagnostic mode started by using the 123123123 button method. After that unit was fully functional.
thank you