Using a Nest thermostat is one of the best ways to perfect the daily schedule of your heating and cooling. This smart thermostat can recognize your preferences and automatically make adjustments. But as you might expect, it won’t work properly or at all if you see an error code on the display. The exact error code supplies useful information about the underlying problem, something a trained technician can use to offer solutions that much sooner.
Listed below are seven of the most likely error codes you might find on your Nest thermostat. We’ll walk you through the basics of each error code as well as how you could solve it and the approximate cost to do so. Remember that while the costs will ultimately hinge on the precise Nest model, you can count on paying around $75-$200 for repairs. This should include travel and labor costs as well as any specific parts needed to wrap up repairs.
e298 – Critical
This critical error code is limited to the latest models of the Nest thermostat and shows up when the power is disconnected from the system. As this is a critical power error, the thermostat will change to the backup battery system. The error message will remain on the screen until the problem is dealt with.
Losing power to your Nest thermostat can be for several reasons. The wiring may have disconnected or become damaged, or a disconnection could have happened further along in your home’s electrical system. This may be the circuit breaker, fuse box or system switch. A knowledgeable technician can inspect electrical connections and wiring until they locate the root of the problem.
e294 – Critical
Critical error code e294 is displayed when your Nest thermostat’s wiring should be reconfigured. More specifically, the technician should reconfigure the R wire. They’ll first perform a factory reset of your thermostat to ensure it’s not merely a software issue. If that doesn’t work, they’ll check the wiring diagram of the thermostat and begin checking connectors.
They’ll detach the power and slowly inspect each wire, ensuring they are fully attached into the connector with the correct amount of uncovered copper. After 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 drains and the thermostat will eventually power down. In the event the breakers are on, you can search a few other places before contacting a professional technician.
As this error can deplete your thermostat’s battery, the first step might be providing enough power to find out if this specific error code is what you’re working with. You can disconnect the thermostat from its base and provide power through a USB cable. Assuming it displays error code 195, you may continue to visually examine components like the wiring as well as your air conditioner’s air filter or drainage system. If you can’t uncover anything wrong with these components, it will probably be best to call a pro.
e103 – Critical
Another critical error code, e103 signifies an electrical issue with your Nest thermostat. More specifically, e103 may refer to an overcurrent problem, which means the wiring is experiencing more power than what is safe and normal. This will sometimes stem from the breaker box, an error from the control board or thanks to a defective connection in the thermostat. Your technician will meticulously investigate 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
Although this error code isn’t critical, it might still stop you from using the Nest thermostat like normal. Error code n260 concerns the lack of a C wire or Nest Power Connector, as not having one can block your Nest from obtaining sufficient power. You can examine the Nest’s C connector for the presence of a C wire and adapt the wiring itself if there is. If not, you need a Nest Power Connector.
During installation of a Nest Power Connector, you might notice error code E297 show up. This can be remedied by updating your thermostat in Settings -> Software -> Update. If the Power Connector was already installed, you’ll instead be required to update the wiring info in the app from Settings -> Thermostat -> Wiring -> Update wiring.
e104 – Critical
Similar to error code e103, e104 is a critical error that’s the result of an overcurrent. If too much power is sent through the Nest’s wiring, it could damage internal components and can even be a fire hazard. If you see this error code appear on your Nest thermostat and want to protect from electrical damage, it’s suggested to shut the power off as soon as you can. You can then get a hold of a professional technician with the proper experience diagnosing and solving electrical malfunctions.
e73 – Critical
When your thermostat displays error code e73, it means that the Rc wire is not getting power.
This could be as straightforward as the breaker being turned off, but it may also be an issue with the wiring. After switching off the power to your HVAC system and thermostat, you can visually check the wires to make sure they’re not loose or damaged. If nothing appears to be out of place, it’s best to speak with a local professional.
