Dryer not heating

HI
As the title states, my dryer is not heating. I have tested sensors and switches and all test ok.
When I go into diagnostic mode there are no error codes displayed. While in diagnostic mode if I press the start button the motor starts and I also get heat, but for some reason there is no heat when running normally.
Thanks

Hello,

Sounds like the problem is a bad control board.

Here are the breakdown diagrams and http://www.appliancepartspros.com/parts-for-whirlpool-gew9200lw1.html

Gene.