What does no power to Rc wire detected mean?
The most common reason for error code e73 / no power to Rc wire detected to appear on the Nest Gen3 display is usually due to AC outdoor unit/compressor shutting down which in turn shuts down power to the Nest thermostat. In most cases, the issue is resolved by servicing of the AC outdoor unit.
Why does my Nest say no power to R wire?
When there is no power to the R-wire on your Nest thermostat, start by checking the wire itself. You should also make sure your drain pan isn’t clogged and that your float switch hasn’t been tripped.
What is the RC wire on a Nest thermostat?
RC and RH. If the air conditioning thermostat has one transformer to power both the heating and cooling system, then the wire from the transformer goes directly to the RC terminal and is called the RC wire. The R wire is the power wire for your heating and cooling system. either Rc or Rh on the Nest thermostat.
Does Nest work with RC wire?
An R wire can go into a Nest Learning Thermostat’s Rc or Rh connector. The Nest Thermostat E only has an R connector, which is typically where an R wire would go. These are not jumper wires, and you can insert the Rc wire into the Rc connector and the Rh wire into the Rh connector.
How do I fix no power to Rh wire?
To fix an E74 error or no power to the Rh wire error on your Nest thermostat, check for loose connections and fix them. If that does not work, clean out the drain pipes and check if the condensate pump associated with your HVAC is clogged.
Where does RC wire go on Nest?
Note: If you have an R, Rc or Rh wire, you can put it into the R connector on the Nest Thermostat. If you have a W2, Y2 or O/B wire, you can put it into the *O/B connector, if needed.
Why is my thermostat not getting power?
A quick fix to restore your thermostat’s power is a tripped circuit breaker or blown fuse, depending what you have in your home. If you check your electrical box and a circuit breaker is tripped, just flip it back. If you have fuses, replace the fuse. Once this is done, check your thermostat.
Does red wire go to RC or RH nest?
Rh stands for Red-Heat and Rc stands for Red-Cool. If you only have a single red wire the jumper between Rh and Rc are required for some heating and cooling hybrid systems depending on your thermostat.
Where does W2 wire go on nest?
Use the wiring diagram you got from the compatibility checker in step 4 to connect your system wires to the Nest Thermostat. Note: If you have an R, Rc or Rh wire, you can put it into the R connector on the Nest Thermostat. If you have a W2, Y2 or O/B wire, you can put it into the *O/B connector, if needed.
What is RC or RH on a thermostat?
Rh stands for Red-Heat and Rc stands for Red-Cool. If you only have a single red wire the jumper between Rh and Rc are required for some heating and cooling hybrid systems depending on your thermostat. Yellow/Y is the AC compressor. White/W is the Heating element. Green/G runs the fan.
Where does e wire go on Nest?
The ‘E’ typically goes to what is called ’emergency heat’ which is often the same as and is connected with the ‘AUX’ (auxiliary heat) used with a heat pump system.
