Using a Nest thermostat is one of the easiest ways to improve the daily schedule of your heating and cooling. This smart thermostat can learn your preferences and automatically make adjustments. But as you might expect, it won’t work well or at all if you see an error code show up. The precise error code supplies useful information about the source of the problem, something a trained technician can use to offer solutions that much quicker.
Listed below are seven of the most common error codes you may find on your Nest thermostat. We’ll review the basics of each error code on top of how you could fix it and the estimated cost to do so. Don’t forget that while the costs will ultimately hinge on the specific Nest model, you can count on paying about $75-$200 for repairs. This should include travel and labor costs as well as any specific parts necessary to finish repairs.
e298 – Critical
This critical error code is limited to new models of the Nest thermostat and shows up when the power is shut off. As 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 resolved.
Losing power to your Nest thermostat can be for several reasons. The wiring might have disconnected or become damaged, or a disconnection might have happened further along in your home’s electrical system. This might be the circuit breaker, fuse box or system switch. A certified technician will check electrical connections and wiring until they locate the source of the problem.
e294 – Critical
Critical error code e294 shows up 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 issue. If that doesn’t work, they’ll check the wiring diagram of the thermostat and start inspecting connectors.
They’ll disconnect the power and progressively look at each wire, making sure they are fully attached into the connector with the proper amount of exposed copper. After they pinpoint the damaged connector, it can be replaced for a new one.
e195 – Critical
This critical error code can appear when the weather outside is particularly hot. The HVAC system can fail and stop giving power to your Nest thermostat. When this problem persists, the backup battery in your thermostat depletes and the thermostat will subsequently power down. In the event the breakers are on, you can search a few other places before contacting a professional technician.
As this error can drain your thermostat’s battery, the first step could be restoring enough power to figure out if this specific error code is what you’re facing. You can separate the thermostat from its base and supply power by using a USB cable. Assuming it reveals error code 195, you can continue to visually examine 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 probably be best to get in touch with a pro.
e103 – Critical
Another critical error code, e103 indicates an electrical problem with your Nest thermostat. More specifically, e103 will refer to an overcurrent problem, which means the wiring is receiving more power than necessary. This can stem from the breaker box, an error from the control board or through a faulty connection in the thermostat. A technician needs to cautiously 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
Even though this error code isn’t critical, it may still keep 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 receiving 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’ll need a Nest Power Connector.
During installation of a Nest Power Connector, you might notice error code E297 be displayed. This can be dealt with 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
Just like error code e103, e104 is a critical error stemming from an overcurrent. If too much power is transported through the Nest’s wiring, it can damage internal components and can even be a fire hazard. If you notice this error code show up on your Nest thermostat and want to protect from electrical damage, it’s suggested to turn the power off as soon as possible. You can then get a hold of a professional technician with the proper experience diagnosing and resolving electrical damage.
e73 – Critical
When your thermostat displays error code e73, it means that the Rc wire is not getting power.
This will sometimes be as simple as the breaker being turned off, but it may also be something with the wiring. After turning off the power to your HVAC system and thermostat, you can visually inspect the wires to make sure none of them are loose or damaged. If nothing seems to be out of place, it’s a good idea to contact a local professional.