Awz-7913 stops ?

I have whirlpool awz-7913 condenser dryer that heats up ok fir about an hour then stops, i turn dial any way then try to turn on again comes up with lights numbers 1,2,6,7 with 3 solid green in middle,ive bin looking at simlar posts but no definitive answer,ive checked both board for any obvious caps but all look fine, can u tell me what the thermal sensor is for at front will that be a cause for the error?also where can i get the test programme rom as the link didnt work from rapid share,
Cheers hop u can help as its just out of warranty.

Tony
June 2013