just noted - running 7.3.1 on RB1100AHx4 I can´t see temperature anymore using /system/health. Only displays Voltage and current... Is this an error in 7.3.1 or in hardware?
[epkulse@MikroTik-1100] /system> health print
Columns: NAME, VALUE, TYPE
# NAME VALUE TYPE
0 voltage 23.3 V
1 current 0.4 A
2 psu1-voltage 24 V
3 psu2-voltage 0 V