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I have Rheem RBHC-14A00NFA AC unit. I am trying to install nest thermostat but don’t know where to connect the C wire. I am attaching the picture of the wires and the diagram. Please help! Thanksenter image description here

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scottmeyer
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2 Answers2

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There is a very elaborate answer to your question in this post:

C -wire

Ruskes
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It's the thick brown wire in the bottom wiring compartment

According to your unit's wiring diagram, your C wire should be a brown wire "tail" in the bottom wiring compartment, and while I can't precisely make out what it's wired to right now, it does appear to be present and connected into the existing condenser wiring, which is a good sign that it is indeed the C wire.

ThreePhaseEel
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