Nest Thermostat No Power To Rc Wire

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If your nest thermostat is displaying the e74 no power to rh wire error code, there's a problem with the rh wire connecting the furnace to the thermostat. This problem will result in power loss to the furnace and is often caused by a blown fuse, a faulty transformer, or a flooded float switch. What color wire powers the nest thermostat? To wire up your nest thermostat, simply:

Connect the yellow wire from the compressor to the y terminal. If your nest thermostat gives you an "e74" error code, it is notifying you that no power to the rh wire is detected. When that happens, your first reaction might be to look for the hvac technician's telephone number. Can't you troubleshoot and fix. The nest thermostat may not have power to the rc wire if any of the following are correct: Wiring, air filter, drain tubes/drip pans, and the hvac fuse. Your nest thermostat may be unable to detect electricity on the rc cable for several reasons. All of them will be covered in this article. This guide will show you how to fix any issues that may occur so that your nest thermostat.