I had the same issue, it was due to the fact as someone stated, I used BC547 transistor (5 pack in the starter kit) rather than the TMP36 sensor (single similar looking but with 3 straight legs).
I had the same issue, it was due to the fact as someone stated, I used BC547 transistor (5 pack in the starter kit) rather than the TMP36 sensor (single similar looking but with 3 straight legs).