Using a Nest thermostat is one of the most convenient ways to perfect the day-to-day 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 properly or at all if you see an error code appear. The precise error code supplies useful information about the source of the problem, something a knowledgeable technician can use to present solutions that much sooner.
Let’s consider seven of the most frequent error codes you could discover on your Nest thermostat. We’ll walk you through the basics of each error code on top of how you can 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 between $75-$200 for repairs. This should include things like travel and labor costs along with any specific components needed to complete repairs.
e298 – Critical
This critical error code is limited to newer models of the Nest thermostat and is displayed when the power is disconnected from the system. As this is a critical power error, the thermostat will change to the backup battery system. The error message will continue to be displayed until the issue is resolved.
Losing power to your Nest thermostat can be for several reasons. The wiring may have disconnected or become damaged, or a disconnection may have happened further along in your home’s electrical system. This might be the circuit breaker, fuse box or system switch. A trained 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 needs to 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 just a software issue. If that doesn’t work, they’ll check the wiring diagram of the thermostat and start looking at connectors.
They’ll shut off the power and gradually look at each wire, seeing to it that they are fully placed into the connector with the proper amount of bare copper. Once they pinpoint the malfunctioning connector, it can be swapped for a new one.
e195 – Critical
This critical error code can surface 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 drains and the thermostat will finally shut down. Presuming the breakers are on, you can check a couple of other places before consulting a professional technician.
As this error can consume your thermostat’s battery, the first step might be providing enough power to find out if this specific error code is what you’re dealing with. You can disconnect the thermostat from its base and provide power by using a USB cable. If it presents error code 195, you can continue to visually examine components including the wiring as well as your air conditioner’s air filter or drainage system. If you don’t detect anything wrong with these components, it’s maybe best to call a pro.
e103 – Critical
Another critical error code, e103 suggests an electrical issue with your Nest thermostat. More specifically, e103 can refer to an overcurrent problem, which means the wiring is receiving more power than what is safe and normal. This will sometimes stem from the breaker box, an error from the control board or because of a defective connection in the thermostat. A technician will meticulously inspect and test the Nest’s electrical system to understand where the power is surging or why the thermostat is convinced there’s an overcurrent problem.
n260
While this error code isn’t critical, it might still prevent you from using the Nest thermostat like normal. Error code n260 concerns the lack of a C wire or Nest Power Connector, as the absence of one can block your Nest from receiving adequate power. You can examine 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.
Due to 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 be required to update the wiring info in the app from Settings -> Thermostat -> Wiring -> Update wiring.
e104 – Critical
Like error code e103, e104 is a critical error stemming from an overcurrent. If excess power is sent inside 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 take steps to prevent electrical damage, it’s recommended to shut the power off as soon as you can. You can then get in touch with a professional technician with the necessary experience identifying and fixing 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 simple 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 inspect the wires to make sure nothing is loose or damaged. If nothing looks to be out of place, it’s best to get in touch with a local professional.
