Use cgwatcher and your problems will disapear (almost)
http://i.imgur.com/mdSVuJ9.png
it can reset your miner or pc if your HR goes belou a certain value, or get accidentally close, or gets to hot.
http://i.imgur.com/zdhB8cb.png

you can set it to send emails for that as well, best of all its free.


Also you can get cgremote (paid beta 10$) and monitor several miners over the internet
http://3.bp.blogspot.com/-wJYi4WCqIRc/UftAJD-ncvI/AAAAAAAAAe8/RPwHbdkmK-4/s1600/miners_rows.png