My dryer is working but not heating up, it has been cleaned for lint an all, but it still wount heat up!

Electric or gas? Dryers have a high limit switch that trips if it over heats, most of these are not resettable and you must replace with new. Even small amounts of lint in the exhaust tube will cause the temp tp rise. How handy are you with machinery and tools?

Is it an electric or gas dryer?