Check dryer venting and vent hood outside for restrictions or excessive lint build-up
The manufacturer has assigned this error or fault code to indicate that the dryer is overheating. This can be caused by several conditions. First, check to be sure the dryer venting is clear all the way from the back of the dryer to the outdoors. Then, check the thermistor for proper operation according to the manufacturers information or replace it. Next, check the cycing thermostat for proper operation or replace it. Finally, if all of those check out, you may have a problem with the heating element not shutting off properly due to a short circuit. Or, there may be a problem with the main control circuit board - though this is rare.