No Power To Rc Wire Detected Nest - This occurs mainly due to extremely hot temperatures, burnt fuse, low voltage to the rc wire,. Try running your old thermostat with the batteries removed. If it doesn't power on, your c wire isn't connected at the air handler. Did you ever find out the problem? Fuse failure occured by my own failure to turn off hvac circuit breaker. For the first time today i am receiving this e73 error code which says that there is no power to rc wire detected. After reading various posts, this error may be due to the ac outdoor. Upon checking the nest unit downstairs, everything was back to working as expected. The safety switch that was being triggered is designed to be a kill switch. You approach the nest control panel and see that it indicates the error “no power to rc wire” detected with a link to nest. com e73. Here are the possible causes of this error:. Luckily, this is easy to fix—in most cases—and should resolve your nest thermostat’s rc terminal power loss problem. Please note that for power loss problems not related to a condensation overflow switch, there may be a solution for your problem on the. I have 2 systems on my house, each with a nest thermostat. My north system suddenly started reporting no power on rc wire. I tested the red rc wire to the blue common wire and there. Look and see if maybe there is a float switch in drain and if so lift the float to see if we get power to the nest. I don’t see a float switch. It would be in the main drain line or an overflow pan under.
This occurs mainly due to extremely hot temperatures, burnt fuse, low voltage to the rc wire,. Try running your old thermostat with the batteries removed. If it doesn't power on, your c wire isn't connected at the air handler. Did you ever find out the problem?