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#1
04-29-2012, 07:44 PM
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Sorry Christy but it's called Murphy's Law.
__________________
If you see it, can take care of it, better get it or put it on hold. Otherwise, it'll be gone & you'll regret it! 
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#2
04-29-2012, 08:02 PM
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Hi Christy
why do heaters always fail in the "on" position? And while your asking Why does a stapler always run out of staples right when you need one? The best way to fail safe a heater system is to use a controller to monitor the temperature and attach all your heaters (cheap or expensive) set to a temperature that is well above that set in the controller. The controller will shut off the electricity to the heater once the controlled heat level has been achieved. Tom R
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#3
04-29-2012, 08:45 PM
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To answer your question... The bimetallic strip activates the switch into the ON position and as it switches over there is often a small arc between the two contacts when they're only a short distance apart. Sometimes this arc can actually cause the contacts to weld together, thus leaving you with a heater that is permanently on. This usually happens as the bimetallic strip begins to fail and the switch switches over slowly or the contacts become worn with age.
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