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Old 01-05-2008, 07:30 PM   #1
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heater problem

My heater went bad in my 100gal so I purchased 2 250 watt heaters.The water temp is 78.8,I have my heaters set to 80.The heater light will come on only for a minute then go off with no temp change.What could be causing this
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Old 01-05-2008, 10:18 PM   #2
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Try unpluging them sometimes the sensors need reset...However it sounds like they sense that they need to boost the water temp then shurt off , or it could be that they are reading the the H20 temp you are set for .2* temp increase ... What brand are they perhaps calling the MFG to see if this is noraml for thier brand I suspect if it is both heaters this is noraml for that brand ... Do keep an eye on them to make sure they dont stick "on"
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Old 01-05-2008, 10:34 PM   #3
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Sounds like normal behavior to me. Just because you set the thermostat at 80 doesn't mean that's the temp it'll keep. I've got VisiTherm Deluxes, and when I first plug them in, the light will come on for a minute or so. If the water temp is above the thermostat setting, it will then turn off. I keep my tank between 77 and 78, but last time I looked the heater are set to 82 or so. The exact number isn't correct, but it does keep a consistent temperature.
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Old 01-06-2008, 02:19 PM   #4
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I am in the same situation as Kurt. I have 2 stealth visatherm 250 watt heaters in my 75 gallon tank set at 86 degrees and it keeps a constant temperature in my tank of 79.5 - 81 degrees. As long as it keeps a constant temperature you should be ok, just pay attention to the water temperature and make sure it does not stick.
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Old 01-14-2008, 02:03 PM   #5
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Make sure there is good water flow around the heaters.
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Old 01-14-2008, 03:19 PM   #6
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There was a defect in the heaters so I sent them back for replacement
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