Old Thermostat wiring is all beige!


Old 11-19-07, 12:20 PM
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Exclamation Old Thermostat wiring is all beige!

I am confused as to how to wire my new programmable thermostat! I have an old " turn dial" style thermostat which has three wires that I can see and two are beige and one is white ... Im reluctant to guess does anyone have any ideas? I thought handling the mercury would be the greatest challenge for this "would be easy" project!
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Old 11-19-07, 12:55 PM
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Old Thermostat wiring is all beige!

Take a look at your old thermostat before disconnecting it. Where the wires connect, you should find some letters that describe what the wires control. - Better yet take a close-up digital photo also if your camera will do that.

When you do disconnect, wrap tape around each wire and identify the connection letters.

If you are lucky, they could match the letters on the new thermostat and guide you through the installation.

Your old thermostat worked, so it is just a matter of finding out what wires did what.

Old 01-02-08, 08:29 AM
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Smile Hvac

Ok here is the easy way,

The wires you have are White, Green, and Red.

If you put the White and one of the other wires together the heat will come on or nothing, if the heat comes on than you have the red and white combination, R & W, the third wire is for the fan , and goes to the G terminal,

I hope that you purchased a battery only type T-Stat other wise the Stat won't work.

Barrery back up type stat runs off constant power and requires a ground.

I hope this answers your question.

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