Answer Hello Mike. HE is a heating circuit error. Make sure the heater and thermistor are good on the unit and if so, replace the control board on the unit. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Monday, November 5, 2012