Generically speaking, no heat in an electric (is that what you have?) dryer is commonly caused by the heating element opening up ( going bad), or possibly a bad temp sensor.
Someone will need to open it up and determine which one has malfunctioned, as you cannot determine this by your description alone. If you're "flying blind", you can search the internet to see what others have found with their Servis M2002S.
More info is needed...
Jim in Tucson, January 2011
