Operating a Nest thermostat is one of the most convenient ways to optimize the daily schedule of your heating and cooling. This smart thermostat can learn your preferences and automatically make changes. But as you can expect, it won’t work correctly or at all if you see an error code appear. The precise error code supplies useful information about the underlying problem, something a trained technician can use to provide solutions that much faster.
Let’s consider seven of the most common error codes you may find on your Nest thermostat. We’ll explain the basics of each error code as well as how you could address it and the projected cost to do so. Remember that while the costs will ultimately hinge on the precise Nest model, you can expect to pay around $75-$200 for repairs. This should include things like travel and labor costs as well as any specific components needed to finish repairs.
e298 – Critical
This critical error code is limited to new models of the Nest thermostat and appears when the power is detached from the system. Because this is a critical power error, the thermostat will switch to the backup battery system. The error message will remain on the screen until the issue is resolved.
Losing power to your Nest thermostat can be for numerous reasons. The wiring could have disconnected or become damaged, or a disconnection may have happened further along in your home’s electrical system. This could be the circuit breaker, fuse box or system switch. A trained technician should check electrical connections and wiring until they uncover the root of the problem.
e294 – Critical
Critical error code e294 appears when your Nest thermostat’s wiring has to be reconfigured. More specifically, you’ll need the technician to reconfigure the R wire. They’ll first perform a factory reset of your thermostat to make sure it’s not just a software error. If that doesn’t work, they’ll check the wiring diagram of the thermostat and start inspecting connectors.
They’ll detach the power and progressively look at each wire, seeing to it that they are fully inserted into the connector with the correct amount of exposed copper. Once they pinpoint the damaged connector, it can be replaced for a new one.
e195 – Critical
This critical error code can appear when the weather outside is particularly hot. The HVAC system can fail and stop sending power to your Nest thermostat. When this problem lingers, the backup battery in your thermostat depletes and the thermostat will subsequently turn off. In the event the breakers are on, you can examine a couple of other places before contacting a professional technician.
Since this error can consume your thermostat’s battery, the first step could be restoring enough power to find out if this specific error code is what you’re dealing with. You can disconnect the thermostat from its base and supply power by using a USB cable. In the event it displays error code 195, you should continue to visually inspect components such as the wiring as well as your air conditioner’s air filter or drainage system. If you struggle to detect anything wrong with these components, it will likely be best to get in touch with a pro.
e103 – Critical
Another critical error code, e103 suggests an electrical malfunction with your Nest thermostat. More specifically, e103 may refer to an overcurrent problem, which means the wiring is receiving more power than needed. This can stem from the breaker box, an error from the control board or through a faulty connection in the thermostat. A technician can cautiously inspect and test the Nest’s electrical system to understand where the power is surging or why the thermostat is convinced there’s an overcurrent problem.
n260
Even though this error code isn’t critical, it could still stop you from using the Nest thermostat like normal. Error code n260 pertains to the lack of a C wire or Nest Power Connector, as missing one can block your Nest from obtaining adequate power. You can check the Nest’s C connector for the presence of a C wire and modify the wiring itself if there is. If not, you can get a Nest Power Connector.
With installation of a Nest Power Connector, you might notice error code E297 show up. This can be resolved by updating your thermostat in Settings -> Software -> Update. If the Power Connector was already installed, you’ll instead have to update the wiring info in the app from Settings -> Thermostat -> Wiring -> Update wiring.
e104 – Critical
Just like error code e103, e104 is a critical error originating from an overcurrent. If too much power is being delivered using the Nest’s wiring, it could damage internal components and may even be a fire hazard. If you see this error code show up on your Nest thermostat and want to guard against electrical damage, it’s recommended to switch the power off straightaway. You can then contact a professional technician with the necessary experience detecting and fixing electrical malfunctions.
e73 – Critical
When your thermostat displays error code e73, it signifies that the Rc wire is not getting power.
This might be as easy as the breaker being turned off, but it may also be a problem with the wiring. After shutting off the power to your HVAC system and thermostat, you can visually examine the wires to make sure nothing is loose or damaged. If nothing seems to be out of place, it’s time to speak with a local professional.