A few resistance readings for that probe(measure with power off):
0C = ~32.6k
10C = ~19.9k
20C = ~12.5k
30C = ~8k
40C =~5.3k
46C = ~4.2k
Now, that's right up near the end of the scale, so you might be seeing a railed out value if you're grounded out. I'm not sure what the max displayed number...