Upgrading from a 4 Wire Thermostat to a 5 Wire Thermostat

Bob installs a smart thermostat, which requires a five wire connection. Our older thermostat has only four wires. Bob shows you how to upgrade from a four wire thermostat to a five wire smart thermostat.

He's installing a Honeywell 9000 Wi-Fi Thermostat, which we purchased. Please read user guides and owners manuals before installing or using any product.

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