Operating a Nest thermostat is one of the best ways to improve the day-to-day schedule of your comfort system. This smart thermostat can be taught your preferences and automatically make adjustments. But as you can expect, it won’t work properly or at all if you see an error code show up. The specific error code provides useful information about the source of the problem, something a trained technician can use to offer solutions that much quicker.
Let’s consider seven of the most common error codes you may find on your Nest thermostat. We’ll walk you through the basics of each error code along with how you can solve it and the approximate cost to do so. Remember that while the price will ultimately depend on the specific Nest model, you can anticipate paying around $75-$200 for repairs. This should include things like travel and labor costs along with any specific components necessary to complete repairs.
e298 – Critical
This critical error code is limited to new models of the Nest thermostat and is displayed when the power is shut off. Because this is a critical power error, the thermostat will change to the backup battery system. The error message will remain on display until the issue is fixed.
Losing power to your Nest thermostat can be for several reasons. The wiring might have disconnected or become damaged, or a disconnection may have occurred 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 uncover the root 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 make sure it’s not merely a software issue. If that doesn’t work, they’ll check the wiring diagram of the thermostat and start checking connectors.
They’ll detach the power and slowly look at each wire, making sure they are fully placed into the connector with the correct amount of exposed copper. Once they pinpoint the problem connector, it can be swapped for a new one.
e195 – Critical
This critical error code can surface when the weather outside is particularly 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. Presuming the breakers are on, you can inspect a couple of other places before contacting a professional technician.
Since this error can consume your thermostat’s battery, the first step may be restoring enough power to figure out if this specific error code is what you’re working with. You can separate the thermostat from its base and provide power by using a USB cable. In the event it presents error code 195, you should continue to visually examine components including 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 probably be best to call a pro.
e103 – Critical
Another critical error code, e103 suggests an electrical problem with your Nest thermostat. More specifically, e103 can refer to an overcurrent problem, which means the wiring is receiving more power than needed. This will sometimes stem from the breaker box, an error from the control board or because of a defective connection in the thermostat. Your technician needs to cautiously investigate and test the Nest’s electrical system to figure out where the power is surging or why the thermostat believes there’s an overcurrent problem.
n260
Although this error code isn’t critical, it might still keep you from using the Nest thermostat like normal. Error code n260 pertains to the lack of a C wire or Nest Power Connector, as the absence of 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 adapt the wiring itself if there is. If not, you need a Nest Power Connector.
With installation of a Nest Power Connector, you may notice error code E297 be displayed. This can be remedied by updating your thermostat in Settings -> Software -> Update. If the Power Connector is already installed, you’ll instead have 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 stemming from an overcurrent. If excess power is transported through the Nest’s wiring, it may damage internal components and could 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 suggested to shut the power off as soon as you can. You can then get a hold of a professional technician with the appropriate experience identifying and resolving electrical issues.
e73 – Critical
When your thermostat displays error code e73, it means that the Rc wire is not receiving power.
This will sometimes be as easy as the breaker being turned off, but it can also be something with the wiring. After shutting off the power to your HVAC system and thermostat, you can visually inspect 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.
