E74 Wiring Report Nest. Web one possible solution for the rc wire nit providing power to your nest thermostat. Web tap on the e74 error:
Rh is power input for the heating side. If the connector button remains in. Web try removing the c wire and leaving it disconnected to see if the wiring report disappears.
Below is the old wire and plugged the red wire to rh to the nest. Rh is power input for the heating side. Web try removing the c wire and leaving it disconnected to see if the wiring report disappears.
Just installed a new nest gen 3 learning thermostat on 01/14/2022. @tphan85, the common wire may not be properly grounded, so the system uses power sharing but doesn’t get enough energy. You will then be sent to the diagram’s “tech info” page.
Web in this video i will be fixing an air conditioner that wont come on, because the thermostat isn't getting power. These errors can be caused by different things depending on the weather as well. To check if it is blown, follow these steps:
Web if you are getting an e73 / 74 error message on your nest thermostat, which is code for rc / rh wire not detected. Web getting an e74 wiring issue power wire. Rh wire no power code that appears on the monitor.
Push the wire as far as it will go by pressing down the connector button. Web bit of nest history. If so, you don't need to connect it, as the nest learning thermostat can charge its built.
