Wiring on Existing Thermostat: Replace with what?

Old 05-13-14, 12:27 PM
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Wiring on Existing Thermostat: Replace with what?

Attaching pictures here for my present thermostat. The Video's I have seen talk about Rc and such, but I dont see any of that, can someone tell me which wire is which. I want to replace this with a Programmable and preferable WiFi enabled Thermostat.
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Old 05-13-14, 06:05 PM
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Welcome to the forums.

Interesting use of colors.

OLD - color - NEW
G - green - G
R - red - R/Rc
Y1 - blue - Y1
E - white - E/aux

You should convert the blue wire to yellow as the Y stands for yellow. However.... the yellow wire may be bad and that's why they used the blue.

You need a C connection from furnace to thermostat that is usually on the blue wire.
Old 05-14-14, 06:28 AM
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Is this a heat pump you are controlling?at any rate you could use the yellow wire for cooling Y1 and repurpose the blue for the common ,you will need to make the changes at the furnace as well.so change the yellow at the thermostat and go to the furnace and swap the yellow for the blue,you may need a volt meter to determine where the common or blue wire connects to,send a pic of what you have t the furnace.

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