My dryer will not automatically shut off when in the sensor mode. What do you think the problem is?
Here are your parts
http://www.appliancepartspros.com/partsearch/modelsearch.aspx?model=MDET446AYW
Check/clean your moisture sensor.
The machine may think that the clothes are still wet.
The way it works is that a voltage is applied to the 2 metal strips.
When moisture or dirt/residue is between the strips a current flows and the board senses this and continues to run.
Clean between the strips with a damp cloth and dry.
If this does not work try isopropyl alcohol, just be sure to let the vapors dissipate before trying it.