Using a Nest thermostat is one of the easiest ways to optimize the daily schedule of your comfort system. This smart thermostat can recognize your preferences and automatically make improvements. But as you may expect, it won’t work properly or at all if you see an error code on the display. The specific error code supplies useful information about the root of the problem, something a knowledgeable technician can use to offer solutions that much quicker.
Here are seven of the most common error codes you could encounter on your Nest thermostat. We’ll walk you through the basics of each error code along with how you can solve it and the projected cost to do so. Don’t forget that while the price will ultimately hinge on the exact Nest model, you can anticipate paying about $75-$200 for repairs. This should also cover travel and labor costs along with any specific hardware needed to finish repairs.
e298 – Critical
This critical error code is limited to the latest 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 display until the issue is resolved.
Losing power to your Nest thermostat can be for a number of reasons. The wiring may have disconnected or become damaged, or a disconnection might have appeared further along in your electrical system. This might be the circuit breaker, fuse box or system switch. A professional technician should inspect electrical connections and wiring until they locate 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 should reconfigure the R wire. They’ll first conduct 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 slowly look at each wire, ensuring they are fully attached into the connector with the correct amount of exposed copper. After they find the malfunctioning connector, it can be exchanged for a new one.
e195 – Critical
This critical error code can show up when the weather outside is especially hot. The HVAC system can break down and stop giving power to your Nest thermostat. When this problem persists, the backup battery in your thermostat depletes and the thermostat will subsequently shut down. In the event the breakers are on, you can search a couple of other places before contacting a professional technician.
As this error can drain your thermostat’s battery, the first step might be providing enough power to determine if this specific error code is what you’re working with. You can separate the thermostat from its base and supply power by using a USB cable. In the event it displays error code 195, you can continue to visually inspect components such as 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 error with your Nest thermostat. More specifically, e103 may refer to an overcurrent problem, which means the wiring is experiencing more power than what is safe and normal. This may stem from the breaker box, an error from the control board or thanks to a defective connection in the thermostat. Your technician should 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 might still keep you from using the Nest thermostat like normal. Error code n260 concerns the lack of a C wire or Nest Power Connector, as not having one can block your Nest from getting sufficient power. You can inspect 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 will sometimes notice error code E297 be displayed. This can be resolved 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
Similar to error code e103, e104 is a critical error stemming from an overcurrent. If excessive power is transported inside the Nest’s wiring, it can 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 protect from electrical damage, it’s a good idea to shut the power off as soon as you can. You can then get in touch with a professional technician with the proper experience diagnosing and solving electrical problems.
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 switched 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 none of them are loose or damaged. If nothing seems to be out of place, it’s time to get in touch with a local professional.