Using a Nest thermostat is one of the best ways to improve the everyday schedule of your heating and cooling. This smart thermostat can learn your preferences and automatically make adjustments. But as you can expect, it won’t work correctly or at all if you see an error code show up. The specific error code supplies useful information about the root of the problem, something a professional technician can use to offer solutions that much quicker.
Listed below are seven of the most likely error codes you could encounter on your Nest thermostat. We’ll review the basics of each error code as well as how you can solve it and the estimated cost to do so. Don’t forget that while the investment will ultimately be dependent on the precise Nest model, you can expect to pay about $75-$200 for repairs. This should also cover travel and labor costs on top of any specific parts necessary to complete repairs.
e298 – Critical
This critical error code is limited to newer models of the Nest thermostat and shows up when the power is detached from the system. As 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 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 appeared further along in your electrical system. This might be the circuit breaker, fuse box or system switch. A certified technician should 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 needs to be reconfigured. More specifically, you’ll need the technician to reconfigure the R wire. They’ll first complete a factory reset of your thermostat to ensure it’s not just a software problem. If that doesn’t work, they’ll review the wiring diagram of the thermostat and start looking at connectors.
They’ll shut off the power and gradually check each wire, ensuring they are fully attached into the connector with the correct amount of exposed copper. After they locate the problem connector, it can be replaced for a new one.
e195 – Critical
This critical error code can show up when the weather outside is especially hot. The HVAC system can shut down and stop delivering power to your Nest thermostat. When this problem lasts, the backup battery in your thermostat drains and the thermostat will finally power down. Presuming the breakers are on, you can search a handful of other places before consulting a professional technician.
Since this error can consume your thermostat’s battery, the first step might be restoring enough power to determine if this specific error code is what you’re facing. You can detach the thermostat from its base and supply power with a USB cable. In the event 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 struggle to find anything wrong with these components, it will likely be best to get in touch with a pro.
e103 – Critical
Another critical error code, e103 signifies an electrical malfunction with your Nest thermostat. More specifically, e103 will refer to an overcurrent problem, which means the wiring is getting more power than needed. This may stem from the breaker box, an error from the control board or thanks to a faulty connection in the thermostat. A technician should cautiously investigate and test the Nest’s electrical system to figure out 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 could still prevent you from using the Nest thermostat how you want to. Error code n260 pertains to the lack of a C wire or Nest Power Connector, as not having one can block your Nest from getting sufficient 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.
With installation of a Nest Power Connector, you may notice error code E297 appear. This can be remedied by updating your thermostat in Settings -> Software -> Update. If the Power Connector has already been 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 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 a good idea to turn the power off as soon as you can. You can then get a hold of a professional technician with the proper experience identifying and solving electrical problems.
e73 – Critical
When your thermostat displays error code e73, it means that the Rc wire is not receiving power.
This might be as easy as the breaker being shut off, but it can also be something with the wiring. After switching off the power to your HVAC system and thermostat, you can visually check the wires to make sure they’re not loose or damaged. If nothing appears to be out of place, it’s time to speak with a local professional.