Using a Nest thermostat is one of the best ways to optimize the daily schedule of your heating and cooling. This smart thermostat can recognize your preferences and automatically make adjustments. But as you can expect, it won’t work well or at all if you see an error code show up. The exact error code offers useful information about the source of the problem, something a professional technician can use to offer solutions that much sooner.
Listed below are seven of the most frequent error codes you could find on your Nest thermostat. We’ll explain the basics of each error code on top of how you might solve it and the estimated cost to do so. Keep in mind that while the price will ultimately be dependent on the precise Nest model, you can anticipate paying between $75-$200 for repairs. This should also cover travel and labor costs on top of any specific components needed to finish repairs.
e298 – Critical
This critical error code is limited to the latest models of the Nest thermostat and appears when the power is detached from the system. As 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 dealt with.
Losing power to your Nest thermostat can be for a number of reasons. The wiring could have disconnected or become damaged, or a disconnection might have appeared further along in your electrical system. This may be the circuit breaker, fuse box or system switch. A certified technician will examine 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 conduct a factory reset of your thermostat to make sure it’s not merely a software problem. If that doesn’t work, they’ll check the wiring diagram of the thermostat and begin looking at connectors.
They’ll shut off the power and slowly inspect each wire, seeing to it that they are fully attached into the connector with the proper amount of bare copper. Once they locate the malfunctioning connector, it can be replaced for a new one.
e195 – Critical
This critical error code can appear when the weather outside is especially hot. The HVAC system can fail and stop delivering power to your Nest thermostat. When this problem lasts, the backup battery in your thermostat depletes and the thermostat will finally shut down. Assuming the breakers are on, you can check a handful of other places before consulting a professional technician.
As this error can drain your thermostat’s battery, the first step may be providing enough power to find out if this specific error code is what you’re working with. You can separate the thermostat from its base and supply power by using a USB cable. In the event it displays error code 195, you may continue to visually check components like the wiring as well as your air conditioner’s air filter or drainage system. If you don’t uncover anything wrong with these components, it will likely be best to get in touch with a pro.
e103 – Critical
Another critical error code, e103 signifies an electrical issue with your Nest thermostat. More specifically, e103 will refer to an overcurrent problem, which means the wiring is getting more power than necessary. This can stem from the breaker box, an error from the control board or through a bad connection in the thermostat. A technician can meticulously examine and test the Nest’s electrical system to figure out where the power is surging or why the thermostat thinks there’s an overcurrent problem.
n260
Even though this error code isn’t critical, it may still stop you from using the Nest thermostat how you want to. Error code n260 concerns the lack of a C wire or Nest Power Connector, as missing one can block your Nest from getting sufficient power. You can inspect 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 will sometimes notice error code E297 show up. This can be remedied by updating your thermostat in Settings -> Software -> Update. If the Power Connector is already installed, you’ll instead need 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 excessive power is being delivered inside the Nest’s wiring, it could damage internal components and could even be a fire hazard. If you see this error code pop up on your Nest thermostat and want to take steps to prevent electrical damage, it’s recommended to turn the power off straightaway. You can then contact a professional technician with the appropriate experience detecting and resolving electrical malfunctions.
e73 – Critical
When your thermostat displays error code e73, it indicates that the Rc wire is not receiving power.
This may be as easy as the breaker being switched 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 contact a local professional.