| I have installed 2 of the rockauto units and the sensor screwed in perfect. You do need to remove one of the block off ports on the side of the unit. You can see it in this photo between both the AC line ports. www.rockauto.com%2Finfo%2FGPD%2F1411457-1.jpg&imagekey=3929031-0&width=450 ]">
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