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.
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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

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