Question about Stiebel Eltron TEMPRA 12 Tankless Water Heater

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Stiebel eltron 12 the thermal breaker keeps popping. I'm an electrical engineer and understand that it's probably residual head left in the chamber when the water is shutting off that is causing the thermal breaker to pop, I don't want to have to keep resetting the breaker with a pencil (cover is off), so I need to do something. I turned it down a little bit and maybe I can put Heat fins to dissipate some of the heat. Any ideas??? Does not happen all the time, but is happening more now.

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Hello; I can't clain any formal training or education in electrical, But, I am a home owner and Mechanic so I'll give this a try. Thermal switches are in the norm based on the bi- metal concept/ Automotive flashers are in essence thermal switches. Of course there are electronic types that contain points and a coil, we can forget those since we aren't doing a car or truck, let alone turn signal. OK, moving on. As you know,excessive continuous heat generated by a excess load will destroy the bi-metal strip which serves as a bridge in the circuit. A defective flasher will increase in speed as it gets older and used heavily. Anyway, to the point. I've experience thermal switches that cease to function if trip too often or were tripped by an excessive load. Although resettable initially, it's thermal tolerance gets shorter and shorter until eventually you get irritated enough to ask someone on Fix-ya for some input. No problem. I reccommend replacing the breaker with or of same amperes. You may want to verify the load by checking the appliance data plate just in case it's the straw the breaks the circuit I hope I helped you and I apologize for the analogy used. Thanks for using fix-ya. Good Luck _Ned_t

Posted on Apr 04, 2011

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