Using a Nest thermostat is one of the easiest ways to optimize the daily schedule of your heating and cooling. This smart thermostat can be taught your preferences and automatically make adjustments. But as you may expect, it won’t work well or at all if you see an error code show up. The exact error code supplies useful information about the source of the problem, something a professional technician can use to present solutions that much quicker.
Listed below are seven of the most common error codes you could encounter on your Nest thermostat. We’ll explain the basics of each error code on top of how you could address it and the estimated cost to do so. Don’t forget that while the investment will ultimately hinge 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 components necessary to finish repairs.
e298 – Critical
This critical error code is limited to new models of the Nest thermostat and shows up when the power is detached from the system. Since this is a critical power error, the thermostat will switch to the backup battery system. The error message will continue to be displayed until the problem is dealt with.
Losing power to your Nest thermostat can be for several reasons. The wiring could have disconnected or become damaged, or a disconnection might have happened further along in your electrical system. This might be the circuit breaker, fuse box or system switch. A trained technician will examine electrical connections and wiring until they uncover the source of the problem.
e294 – Critical
Critical error code e294 is displayed when your Nest thermostat’s wiring should be reconfigured. More specifically, the technician will need to reconfigure the R wire. They’ll first conduct a factory reset of your thermostat to make sure it’s not merely a software problem. If that doesn’t work, they’ll examine the wiring diagram of the thermostat and start checking connectors.
They’ll shut off the power and gradually look at each wire, making sure they are fully inserted into the connector with the correct amount of bare copper. When they pinpoint the problem connector, it can be exchanged for a new one.
e195 – Critical
This critical error code can surface when the weather outside is severely hot. The HVAC system can shut down and stop sending power to your Nest thermostat. When this problem lingers, the backup battery in your thermostat depletes and the thermostat will eventually power down. Presuming the breakers are on, you can examine a handful of other places before consulting a professional technician.
Since this error can deplete your thermostat’s battery, the first step may be providing enough power to find out if this specific error code is what you’re facing. You can disconnect the thermostat from its base and deliver power by using a USB cable. In the event it presents error code 195, you should continue to visually inspect components including the wiring as well as your air conditioner’s air filter or drainage system. If you can’t uncover anything wrong with these components, it will likely be best to call a pro.
e103 – Critical
Another critical error code, e103 suggests an electrical problem 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 will sometimes stem from the breaker box, an error from the control board or through a defective connection in the thermostat. The technician will meticulously inspect 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 can 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 examine the Nest’s C connector for the presence of a C wire and modify the wiring itself if there is. If not, you need a Nest Power Connector.
Due to installation of a Nest Power Connector, you might notice error code E297 show up. This can be remedied by updating your thermostat in Settings -> Software -> Update. If the Power Connector has already been installed, you’ll instead need 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 originating from an overcurrent. If excess power is transported through the Nest’s wiring, it can damage internal components and could even be a fire hazard. If you notice this error code show up on your Nest thermostat and want to protect from 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 detecting and resolving electrical issues.
e73 – Critical
When your thermostat displays error code e73, it signifies that the Rc wire is not getting power.
This could be as straightforward as the breaker being switched off, but it can also be a problem 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 a good idea to speak with a local professional.