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#1
04-29-2012, 05:29 PM
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why do heaters always fail in the "on" position?
I mean come on! I don't know how many bloody heaters I've had die on me over the years and every single time they cook the tank. Came downstairs to my nano at 89.7F. Friggin ridiculous!!
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Christy's Reef Blog My 180 Build Every electronic component is shipped with smoke stored deep inside.... only a real genius can find a way to set it free. 
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#3
04-29-2012, 05:34 PM
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oh this is some crap brand probably, I don't even think it says on it. It just says Thermo Compact Pre-Set. Its a 50watter so I was kind of limited by what I could find for a nano around here.
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Christy's Reef Blog My 180 Build Every electronic component is shipped with smoke stored deep inside.... only a real genius can find a way to set it free.
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#4
04-29-2012, 05:52 PM
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Quote:
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Current System 75 Gal with 30 Gal Sump Reef Past Tanks 60 Gallon True Cube 30 Gallon Breeder 165 Eurobraced Starfire Custom 10 Gallon Softy Tank(My First Tank)
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#5
04-29-2012, 05:55 PM
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this one is no different from any of the other heaters I have, are there some that aren't pre-set (that don't cost a fortune because they have their own fancy external controller)? All of mine you dial to wherever you want it and it heats to that temperature (or close to it anyways).
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Christy's Reef Blog My 180 Build Every electronic component is shipped with smoke stored deep inside.... only a real genius can find a way to set it free.
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#6
04-29-2012, 07:12 PM
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most heaters are regulated by a bimetallic strip which basically will fail with time. They are not seleniod switches which open on fail. Your best choice ia a Thermocouple and controller. You can program in failsafes
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#8
04-29-2012, 07:44 PM
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Sorry Christy but it's called Murphy's Law.
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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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#9
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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#10
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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