Installing a Nest thermostat is one of the best ways to improve the day-to-day 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 well or at all if you see an error code show up. The specific error code provides useful information about the underlying problem, something a professional technician can use to present solutions that much sooner.
Let’s consider seven of the most likely error codes you could encounter on your Nest thermostat. We’ll explain the basics of each error code as well as how you could fix it and the approximate cost to do so. Don’t forget that while the price will ultimately depend on the precise Nest model, you can expect to pay about $75-$200 for repairs. This should include things like travel and labor costs along with any specific components necessary 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. As this is a critical power error, the thermostat will swap 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 a number of reasons. The wiring could have disconnected or become damaged, or a disconnection could have occurred further along in your home’s electrical system. This may be the circuit breaker, fuse box or system switch. A trained technician should examine electrical connections and wiring until they find the source of the problem.
e294 – Critical
Critical error code e294 is displayed when your Nest thermostat’s wiring should be reconfigured. More specifically, the technician will need to reconfigure the R wire. They’ll first complete a factory reset of your thermostat to ensure it’s not simply a software problem. If that doesn’t work, they’ll examine the wiring diagram of the thermostat and begin checking connectors.
They’ll shut off the power and gradually inspect each wire, seeing to it that they are fully attached into the connector with the proper amount of exposed copper. Once they locate the malfunctioning connector, it can be exchanged 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 subsequently shut down. 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 may be restoring enough power to figure out if this specific error code is what you’re facing. You can detach the thermostat from its base and supply power by using a USB cable. Assuming it presents 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 struggle to detect anything wrong with these components, it’s maybe best to get in touch with a pro.
e103 – Critical
Another critical error code, e103 signifies an electrical malfunction with your Nest thermostat. More specifically, e103 may refer to an overcurrent problem, which means the wiring is experiencing more power than necessary. This will sometimes stem from the breaker box, an error from the control board or through a bad connection in the thermostat. Your technician needs to meticulously examine and test the Nest’s electrical system to determine 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 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 receiving adequate power. You can check the Nest’s C connector for the presence of a C wire and adapt the wiring itself if there is. If not, you’ll need a Nest Power Connector.
With installation of a Nest Power Connector, you might notice error code E297 appear. This can be resolved by updating your thermostat in Settings -> Software -> Update. If the Power Connector is 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 originating from an overcurrent. If too much power is being delivered using the Nest’s wiring, it may 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 protect from electrical damage, it’s suggested to shut the power off as soon as possible. You can then get in touch with a professional technician with the proper experience detecting and resolving electrical issues.
e73 – Critical
When your thermostat displays error code e73, it signifies that the Rc wire is not receiving power.
This may be as easy as the breaker being turned off, but it can 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 seems to be out of place, it’s a good idea to get in touch with a local professional.
