Line voltage systems have thick wires black or white wires with wire nuts. Unscrew the screws or depress the clasps and pull the thermostat gently away from the wall plateĬheck your wires – Your thermostat cannot operate with line voltage systems. Remove your old thermostat from the wall plate – Look for screws, buttons or clasps. If the system does not start, power is off (If your thermostat lost power when you turned off the breaker / switch, your power is off.) Turn the power off – at your breaker box or at your HVAC system (typically controlled by a mounted light switch on the furnace / air handler)Ĭheck that the system is off – Switch your thermostat to heating or cooling and wait 5-7 minutes. The basic installation / quick start guide is included with your thermostat (Touch here for a digital copy).
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