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I'm installing a Honeywell RTH7600B programmable thermostat and replacing a Honeywell T87F2873. The new one calls for a Red, Green, White, and Yellow wire, while I only have a Red, Green White and Blue. How should I connect the new thermostat?

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Every thing the same except take your blue wire and replace the yellow for it. So when you hook it to t-stat goes like this

Red to R
White to W
Green to G
Blue to Y


Posted on Jan 16, 2009

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