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 adjustments. But as you may 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 underlying problem, something a trained technician can use to present solutions that much faster.
Let’s consider seven of the most likely error codes you may find on your Nest thermostat. We’ll review the basics of each error code on top of how you might solve it and the projected cost to do so. Don’t forget that while the price will ultimately depend on the exact Nest model, you can expect to pay around $75-$200 for repairs. This should include travel and labor costs as well as any specific parts required to wrap up repairs.
e298 – Critical
This critical error code is limited to new 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 switch 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 numerous reasons. The wiring may have disconnected or become damaged, or a disconnection might have appeared further along in your home’s electrical system. This could be the circuit breaker, fuse box or system switch. A professional technician will examine 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 should 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 examine the wiring diagram of the thermostat and start inspecting connectors.
They’ll shut off the power and slowly inspect each wire, making sure they are fully attached into the connector with the correct amount of uncovered copper. Once they find the problem 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 shut down and stop delivering power to your Nest thermostat. When this problem lingers, the backup battery in your thermostat drains and the thermostat will finally turn off. In the event the breakers are on, you can examine a couple of other places before calling a professional technician.
Since this error can consume your thermostat’s battery, the first step could be restoring enough power to find out if this specific error code is what you’re working with. You can disconnect the thermostat from its base and supply power by using a USB cable. Assuming it presents error code 195, you can continue to visually inspect components like the wiring as well as your air conditioner’s air filter or drainage system. If you can’t detect anything wrong with these components, it will probably be best to contact a pro.
e103 – Critical
Another critical error code, e103 suggests an electrical malfunction 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 can stem from the breaker box, an error from the control board or because of a bad connection in the thermostat. The technician can cautiously examine and test the Nest’s electrical system to determine where the power is surging or why the thermostat is convinced there’s an overcurrent problem.
n260
Even though this error code isn’t critical, it may still prevent you from using the Nest thermostat how you prefer to. Error code n260 refers to the lack of a C wire or Nest Power Connector, as not having one can block your Nest from obtaining 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 need a Nest Power Connector.
Due to installation of a Nest Power Connector, you will sometimes notice error code E297 show up. This can be resolved by updating your thermostat in Settings -> Software -> Update. If the Power Connector has already been 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 excess power is sent through the Nest’s wiring, it may damage internal components and may even be a fire hazard. If you see this error code pop up on your Nest thermostat and want to guard against electrical damage, it’s recommended to turn the power off straightaway. You can then get in touch with a professional technician with the proper 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 might be as straightforward as the breaker being switched off, but it could also be an issue with the wiring. After shutting off the power to your HVAC system and thermostat, you can visually examine the wires to make sure none of them are loose or damaged. If nothing looks to be out of place, it’s time to get in touch with a local professional.