Proportional thermostats by design are solid state and no mechancal contacts to "stick" in the on position. All that I know of are programed to shut off power to the output on any type of fail situation.



Also, besides the obvious catastrophic stuck on fail mode mechanicals can have, They tend to have more intense temp swings because the heat element gets full power until the stat probe reaches shut off temp.
-----
Thanks,





Dave Colling



www.rainbows-r-us-reptiles.com







0.1 Wife (WC and still very fiesty)

0.2 kids (CBB, a big part of our selective breeding program)



LOL, to many snakes to list, last count:

26.49 BRB

20.21 BCI

And those are only the breeders



lots.lots.lots feeder mice and rats

[ Hide Replies ]

• Is a proportional thermostat safer? - rudykirk, Sat Oct 4 16:06:00 2008
• Absolutely!!!! - rainbowsrus, Sun Oct 5 00:30:06 2008
• RE: Absolutely!!!! - Bighurt, Sun Oct 5 12:43:25 2008
• RE: Absolutely!!!! - caz223, Mon Oct 6 01:31:08 2008
• RE: Absolutely!!!! - BobS, Mon Oct 6 11:15:29 2008
• Solid state components fail too! - caz223, Mon Oct 6 11:40:56 2008
• RE: Solid state components fail too! - BobS, Mon Oct 6 12:06:07 2008
• RE: Absolutely!!!! - caz223, Mon Oct 6 12:57:50 2008
• UPS ?......... - BobS, Mon Oct 6 13:28:40 2008
• Uninterrupted Power Supply - Bighurt, Mon Oct 6 17:28:42 2008
• Thanks np - BobS, Mon Oct 6 20:56:45 2008
• ARS racks - caz223, Mon Oct 6 22:02:53 2008
• RE: Nice responses - markg, Mon Oct 6 13:45:46 2008
• More.... - rainbowsrus, Mon Oct 6 17:34:29 2008
• RE: More.... - caz223, Mon Oct 6 22:28:52 2008
• RE: Rule of thumb - markg, Mon Oct 6 13:58:01 2008
• RE: Rule of thumb - caz223, Mon Oct 6 22:36:26 2008
• RE: Rule of thumb - caz223, Mon Oct 6 22:58:32 2008
• kill-a-watt - caz223, Mon Oct 6 23:04:46 2008
• They call them dimmer switches.... - caz223, Mon Oct 6 23:20:44 2008
• RE: They call them dimmer switches.... - markg, Tue Oct 7 12:39:07 2008