Quote Originally Posted by Agent73 View Post
Helix and Herpstat are pulse proportional thermostats, meaning they have no mechanical relay (i.e. no parts with friction on them that could wear out) so I can think of no reason to change one out that is performing normally, no matter how old it is.

But then again I am no thermostat expert, so I would recommend contacting one.
You can reach Spyder Robotics (Herpstat) at: sales@spyderrobotics.com
Helix (DBS-100) at: support@helixcontrols.com
And Reptile Basics (Vivarium Thermostat) at sales@reptilebasics.com

http://spyderrobotics.com/index.html
http://www.helixcontrols.com/
http://www.reptilebasics.com/thermostats
thats the way I should have gone in the first place but figured I may run across members who experienced problems or what not thank's for the links