The resistance across the oven temperature sensor wires suppose to be about 1100 Ohms at the room temperature.
If you got a different reading then the oven sensor has to be replaced.
Also check the sensor wires and the connection at the control board.
- The part number for the oven temperature sensor is
AP3998148
- Here are the break down diagrams for the Amana range
Model AGDS902E
Happy New year!
Gene.