how would you know if the thermostat was faulty?

cooker not fully cooking food in the amount of time required. possibly the thermostat?? its a blomberg cooker.
mr neville tubby, August 2005
my creda solarglo double oven is burning most food but the thermostat light seems to work, also the rubber linning is half off ? is my thermostat wrong.?

Helen Bell, December 2005
link Click here to see other fixes for Blomberg.