If {TAIL ~ the temperature rise} is less than {HEAD ~ a predefined threshold}, no action is taken 
If { TAIL ~ the temperature rise } is less than { HEAD ~ a predefined threshold } , no action is taken
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH