why do heaters always fail in the "on" position? - Canreef Aquatics Bulletin Board

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why do heaters always fail in the "on" position?

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04-29-2012, 08:12 PM

fencer

Member

Join Date: Aug 2007

Location: Ed Ab

Posts: 1,331

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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