Oven was not correctly heating to set temperature

Removed the approximatly 10 screws that hold on both the upper and lower pieces of sheet metal that cover the back of the oven. Removed the screw holding in the temp sensor. Unplugged and removed the old sensor. Plugged in and installed the new sensor (using one of the included adapter wires supplied with the sensor). Put the 2 pieces of sheet metal back on and plugged in the oven.