Trogers,
The "AD" in the display would indicate the auto dry cycle has been selected, and the dryer control is trying to determine the needed drying time.
"The following will be displayed during an Auto Dry cycle:

· The Estimated Drying time for the cycle selected will be displayed for approximately 5 minutes. · The “Ad” is displayed until the Estimated Drying Time for your specific load has been determined. · The cycle status will change from “Auto Dry” to “Cool Down” while the load is being tumbled without heat. · “dn” is displayed when the cycle is done."
Without a model number, it's a bit rough to help you out, but If you'r4e selecting the auto dry selection, you need to check and clean the sensor bar in the drum with rubbing alcohol to remove any build up and debris on the sensor bars. If you can get a model number off the serial plate, we can assist you more efficiently and accurately, if this doesn't solve the issue.

:) :) :)

Scott, Yes, the symptoms appear to be the same as the previous post, "AD" indicates the auto dry selection has been made. check and clean the sensor bars, If the problem persists, remove the lower access panel, retrieve the tech data sheet, and review the error codes logged in the control board memory. The error codes, will give us an idea of what's wrong and where to start.