this post was submitted on 27 Dec 2023
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Plumbing
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The rust and/or bad connection will create resistance at the connection, which can cause it to heat up as well. If that's what happened, it could have melted the wire nut slowly till the wire was exposed, and shorted against a metal part. It looks like there is a diagram of the wiring too to the left near that connection too, which may help if you need to disconnect/reconnect it.