Using a Nest thermostat is one of the easiest ways to improve the everyday schedule of your heating and cooling. This smart thermostat can be taught your preferences and automatically make improvements. 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 present solutions that much faster.
Here are seven of the most frequent error codes you may find on your Nest thermostat. We’ll review the basics of each error code as well as how you could address it and the projected cost to do so. Keep in mind that while the costs 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 on top of any specific parts necessary to wrap up 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. 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 dealt with.
Losing power to your Nest thermostat can be for numerous reasons. The wiring could have disconnected or become damaged, or a disconnection might have happened further along in the electrical system. This might be the circuit breaker, fuse box or system switch. A knowledgeable technician can check electrical connections and wiring until they uncover the root of the problem.
e294 – Critical
Critical error code e294 is displayed when your Nest thermostat’s wiring should be reconfigured. More specifically, the technician should 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 slowly look at each wire, ensuring they are fully attached into the connector with the correct amount of bare copper. After they pinpoint the malfunctioning connector, it can be replaced for a new one.
e195 – Critical
This critical error code can surface when the weather outside is severely hot. The HVAC system can break down and stop sending power to your Nest thermostat. When this problem lingers, the backup battery in your thermostat drains and the thermostat will eventually power down. In the event the breakers are on, you can check a few other places before calling a professional technician.
Because this error can deplete your thermostat’s battery, the first step could be providing enough power to find out if this specific error code is what you’re working with. You can detach the thermostat from its base and deliver power through a USB cable. In the event it reveals error code 195, you may continue to visually inspect components including the wiring as well as your air conditioner’s air filter or drainage system. If you struggle to uncover anything wrong with these components, it’s maybe best to contact a pro.
e103 – Critical
Another critical error code, e103 signifies an electrical issue with your Nest thermostat. More specifically, e103 will refer to an overcurrent problem, which means the wiring is getting more power than what is safe and normal. This may stem from the breaker box, an error from the control board or through a faulty connection in the thermostat. The technician needs to carefully investigate and test the Nest’s electrical system to understand where the power is surging or why the thermostat believes there’s an overcurrent problem.
n260
While this error code isn’t critical, it may still prevent you from using the Nest thermostat like normal. Error code n260 refers to the lack of a C wire or Nest Power Connector, as the absence of 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 modify the wiring itself if there is. If not, you can get a Nest Power Connector.
Due to installation of a Nest Power Connector, you may 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 need 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 originating from an overcurrent. If excessive power is transported using the Nest’s wiring, it may damage internal components and can even be a fire hazard. If you see this error code show up on your Nest thermostat and want to guard against electrical damage, it’s suggested to shut the power off as soon as you can. You can then get in touch with a professional technician with the proper experience detecting and solving electrical issues.
e73 – Critical
When your thermostat displays error code e73, it signifies that the Rc wire is not receiving power.
This could be as simple as the breaker being shut off, but it may also be an issue with the wiring. After turning 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 looks to be out of place, it’s a good idea to contact a local professional.
