My sensor doesn't seem to work either. I get these values:
Sensor value: 26, Volts: 0.13, degrees C: -37.30
Sensor value: 25, Volts: 0.12, degrees C: -37.79
I have the same code as in the manual, and connected everything like the manual too.
If i use 3.3V instead of 5V i get:
Sensor value: 34, Volts: 0.17, degrees C: -33.40
Sensor value: 34, Volts: 0.17, degrees C: -33.40