Installing a Nest thermostat is one of the most convenient ways to perfect the everyday schedule of your comfort system. This smart thermostat can be taught your preferences and automatically make improvements. But as you can expect, it won’t work well or at all if you see an error code on the display. The precise error code supplies useful information about the underlying problem, something a knowledgeable technician can use to provide solutions that much quicker.
Let’s consider seven of the most likely error codes you could find on your Nest thermostat. We’ll review the basics of each error code on top of how you can address it and the estimated cost to do so. Keep in mind that while the costs will ultimately be dependent on the precise Nest model, you can count on paying around $75-$200 for repairs. This should also cover travel and labor costs as well as any specific components required to finish repairs.
e298 – Critical
This critical error code is limited to the latest models of the Nest thermostat and shows up when the power is detached from the system. As this is a critical power error, the thermostat will change to the backup battery system. The error message will continue to be displayed until the issue is resolved.
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 electrical system. This may be the circuit breaker, fuse box or system switch. A knowledgeable technician should inspect electrical connections and wiring until they uncover the source of the problem.
e294 – Critical
Critical error code e294 appears when your Nest thermostat’s wiring should be reconfigured. More specifically, you’ll need the technician to reconfigure the R wire. They’ll first conduct a factory reset of your thermostat to ensure it’s not just a software error. If that doesn’t work, they’ll examine the wiring diagram of the thermostat and start inspecting connectors.
They’ll disconnect the power and slowly look at each wire, seeing to it that they are fully attached into the connector with the correct amount of uncovered copper. After they pinpoint the malfunctioning connector, it can be replaced for a new one.
e195 – Critical
This critical error code can appear when the weather outside is severely hot. The HVAC system can break down and stop delivering power to your Nest thermostat. When this problem persists, the backup battery in your thermostat depletes and the thermostat will eventually turn off. Assuming the breakers are on, you can examine a few other places before consulting a professional technician.
Because this error can drain your thermostat’s battery, the first step might be restoring enough power to figure out if this specific error code is what you’re dealing with. You can detach the thermostat from its base and provide power through a USB cable. Assuming it displays error code 195, you should continue to visually inspect components like the wiring as well as your air conditioner’s air filter or drainage system. If you struggle to find anything wrong with these components, it’s maybe best to contact a pro.
e103 – Critical
Another critical error code, e103 indicates 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 necessary. This may stem from the breaker box, an error from the control board or thanks to a faulty connection in the thermostat. The technician will carefully examine and test the Nest’s electrical system to determine where the power is surging or why the thermostat believes there’s an overcurrent problem.
n260
Even though this error code isn’t critical, it can 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 obtaining adequate power. You can check the Nest’s C connector for the presence of a C wire and adjust the wiring itself if there is. If not, you can get a Nest Power Connector.
During installation of a Nest Power Connector, you might notice error code E297 be displayed. This can be remedied by updating your thermostat in Settings -> Software -> Update. If the Power Connector has already been installed, you’ll instead be required to update the wiring info in the app from Settings -> Thermostat -> Wiring -> Update wiring.
e104 – Critical
Like error code e103, e104 is a critical error stemming from an overcurrent. If excessive power is transported inside the Nest’s wiring, it could damage internal components and may even be a fire hazard. If you notice this error code pop up on your Nest thermostat and want to guard against electrical damage, it’s suggested to turn the power off as soon as you can. You can then contact a professional technician with the necessary experience diagnosing and fixing electrical issues.
e73 – Critical
When your thermostat displays error code e73, it indicates that the Rc wire is not getting power.
This could be as simple as the breaker being shut off, but it can also be a problem with the wiring. After shutting 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 looks to be out of place, it’s best to speak with a local professional.
