Installing a Nest thermostat is one of the best ways to improve the everyday schedule of your comfort system. This smart thermostat can recognize your preferences and automatically make changes. But as you might expect, it won’t work properly or at all if you see an error code show up. The precise error code provides useful information about the underlying problem, something a professional technician can use to offer solutions that much sooner.
Let’s consider seven of the most frequent error codes you may encounter on your Nest thermostat. We’ll review the basics of each error code as well as how you could fix it and the projected cost to do so. Keep in mind that while the investment will ultimately hinge on the precise Nest model, you can anticipate paying between $75-$200 for repairs. This should include things like travel and labor costs along with any specific parts required to wrap up repairs.
e298 – Critical
This critical error code is limited to newer models of the Nest thermostat and appears when the power is detached from the system. Since 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 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 may have happened further along in your home’s electrical system. This could be the circuit breaker, fuse box or system switch. A knowledgeable technician can inspect electrical connections and wiring until they find the source of the problem.
e294 – Critical
Critical error code e294 appears when your Nest thermostat’s wiring has to be reconfigured. More specifically, the technician will need 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 examine the wiring diagram of the thermostat and begin inspecting connectors.
They’ll disconnect the power and slowly check each wire, seeing to it that they are fully attached into the connector with the proper amount of uncovered copper. When they pinpoint the damaged connector, it can be exchanged for a new one.
e195 – Critical
This critical error code can appear when the weather outside is severely hot. The HVAC system can shut down and stop sending power to your Nest thermostat. When this problem lasts, the backup battery in your thermostat depletes and the thermostat will finally power down. Presuming the breakers are on, you can inspect a handful of other places before contacting a professional technician.
Because this error can deplete your thermostat’s battery, the first step could be providing enough power to determine if this specific error code is what you’re dealing with. You can detach the thermostat from its base and provide power by using a USB cable. In the event it displays error code 195, you should continue to visually check components such as the wiring as well as your air conditioner’s air filter or drainage system. If you don’t find anything wrong with these components, it’s maybe best to call a pro.
e103 – Critical
Another critical error code, e103 indicates an electrical issue with your Nest thermostat. More specifically, e103 can refer to an overcurrent problem, which means the wiring is getting more power than what is safe and normal. This can stem from the breaker box, an error from the control board or because of a defective connection in the thermostat. Your technician should meticulously investigate and test the Nest’s electrical system to understand where the power is surging or why the thermostat thinks there’s an overcurrent problem.
n260
Although this error code isn’t critical, it may still prevent you from using the Nest thermostat how you prefer to. Error code n260 pertains to the lack of a C wire or Nest Power Connector, as missing one can block your Nest from getting enough 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.
Due to installation of a Nest Power Connector, you might notice error code E297 appear. This can be remedied 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 stemming from an overcurrent. If excess power is being delivered using the Nest’s wiring, it can damage internal components and may even be a fire hazard. If you notice this error code appear on your Nest thermostat and want to protect from electrical damage, it’s a good idea to switch the power off as soon as you can. You can then get a hold of a professional technician with the proper experience diagnosing and fixing electrical malfunctions.
e73 – Critical
When your thermostat displays error code e73, it indicates that the Rc wire is not getting power.
This will sometimes be as straightforward as the breaker being turned off, but it could 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 seems to be out of place, it’s a good idea to contact a local professional.