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Alarm light stays on and there is no heat - Optimus H-4436 Electric Heater

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On the back there's a round cover held on with 3 Philips screws. Remove it. You should see a peice of thermal/electrical insulation with a red wire going in one end and a white wire on the other end. It's screwed down with a wire hanger and covering a 15Amp FUSE. Its part number is "SF119U-1", made by SEFUSE, rated 15Amps/125degC. The sell for about $5 for 5 of them. You can get one at RadioShack or better yet, replace it with a thermal circuit breaker (part # R59-15A), which costs about $5, but the nice thing is that if/when it trips, you can reset it instead of replacing it.

Posted on Dec 11, 2012

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Posted on Jan 02, 2017

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