Product review (5 stars): Not heating is user error for us
My Fisher Paykel dryer also stops heating but I have found that it is user error on our part.  In my dryer, there is a removable lint trap on the left side of the drum inside the machine. If you only clean that, your dryer WILL stop heating.  There is a screw at the bottom of where the lint trap cup is placed that you need to remove to take that front plastic plate off.  For us, when we do that it is FULL of lint that clogs the holes tripping the red button (as it should).  If we do not clean that cover, pushing the red button will end up doing next to nothing at all.  I just had to do it again today and all is well again.  Works for about 18 months before I should do it again on our usage.