They havent been wrong at all Ive had an infrared temperature gun to test this it was not far out at all , Think its to remove a visible issue , eventually one day these chips will crack and fracture with the heating and cooling /expanding and contracting running at these heat levels ,I would not expect to get 3 years out a wetek at all this is why I installed new heatsinks and fans in mine ,Ive been a service technician in the past for 10 years and its always been the case that sat and cable boxes when it was a fashion to have them in closed cabinets , developed the issue described at lower temperatures than wetek are running at hence they are sold at throw away prices
- - - Updated - - -
Just my opinion
What temperatures were you reading with your temperature gun?
When I was running OpenELEC 5.0.8 the System Info page was reporting a temp of around 38 degrees C when the device was idle.
This seems acceptable to me, unless of course that reading was in fact wildly in-accurate