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GimpyChinaman t1_jc1hyxr wrote

Just match up each of the wires to the same letters on the new thermostat. The letters describe the function of the wires, not their colours.

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goldbird54 t1_jc24zk8 wrote

This is why most new thermostats come with stickers that have the letters on them. Put the stickers on the wires according to the terminal letters before disconnecting them. Then put a piece of clear tape over them because the stickers don’t adhere very well.

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chrissilich t1_jc1mddj wrote

Ok, I’ll bite. What do they stand for?

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spkdanknugs t1_jc26fi7 wrote

E: Emergency heat Aux: Auxiliary heat Y: Cooling G:Fan O: Heat pump reverse valve switch L: Indicator lights R: Power C: Common

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greem t1_jc1q1x1 wrote

Black, blue, green, orange, yellow, and white.

And yellow 2 which is sometimes blue.

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I_Arman t1_jc36ng5 wrote

Assuming someone didn't just hook wires up however they liked... ask me how I know

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HemHaw t1_jc3shfv wrote

You can always check on the other side

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I_Arman t1_jc79vml wrote

And it's a good idea to do so. Trust, but verify.

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[deleted] t1_jc3hctt wrote

[deleted]

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AmosMosesWasACajun t1_jc3ul8z wrote

There’s already quite a few data communicating thermostats on the market!

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[deleted] t1_jc3v1jm wrote

[deleted]

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AmosMosesWasACajun t1_jc3vnfs wrote

Most manufacturers have them on their higher end equipment, but yes less common on shelves because they’re all proprietary for the specific equipment.

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