How To Wire My Thermostat December 31, 2018 Wiring . diy.stackexchange.comHeat only 2. This article applies to the ecobee3, ecobee3 lite, and ecobee4 ecobee thermostats require a C (common) wire to power on. If you only... support.ecobee.com Ceiling Wire Pole4 Switch Light SwitchSingle Switch Multiple LightsHow To 3 Way SwitchPc Monitor Cables ConnectorsCeiling Fan Switch RepairHoneywell Thermostat Wiring Diagram 5 WireDifference Between 240v And 250v