Using a Nest thermostat is one of the most convenient ways to optimize the everyday schedule of your comfort system. This smart thermostat can recognize your preferences and automatically make adjustments. But as you might expect, it won’t work well or at all if you see an error code on the display. The specific error code supplies useful information about the source of the problem, something a professional technician can use to present solutions that much sooner.
Here are seven of the most frequent error codes you could find on your Nest thermostat. We’ll explain the basics of each error code as well as 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 anticipate paying about $75-$200 for repairs. This should also cover travel and labor costs as well as any specific hardware necessary 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 shut off. Since 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 fixed.
Losing power to your Nest thermostat can be for numerous reasons. The wiring could have disconnected or become damaged, or a disconnection could have occurred further along in your electrical system. This could be the circuit breaker, fuse box or system switch. A certified technician can check electrical connections and wiring until they locate the source of the problem.
e294 – Critical
Critical error code e294 appears when your Nest thermostat’s wiring has to 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 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 progressively check each wire, ensuring they are fully attached into the connector with the correct amount of bare copper. When they find the malfunctioning connector, it can be exchanged for a new one.
e195 – Critical
This critical error code can surface when the weather outside is particularly hot. The HVAC system can break down and stop sending power to your Nest thermostat. When this problem persists, 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 handful of other places before contacting a professional technician.
Because this error can deplete your thermostat’s battery, the first step may be restoring enough power to figure out if this specific error code is what you’re working with. You can disconnect the thermostat from its base and deliver power with a USB cable. If it displays error code 195, you should continue to visually check components including the wiring as well as your air conditioner’s air filter or drainage system. If you don’t uncover anything wrong with these components, it’s maybe best to contact a pro.
e103 – Critical
Another critical error code, e103 suggests an electrical error with your Nest thermostat. More specifically, e103 will refer to an overcurrent problem, which means the wiring is receiving more power than necessary. This will sometimes stem from the breaker box, an error from the control board or thanks to a bad connection in the thermostat. Your technician should cautiously inspect 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
Even though this error code isn’t critical, it may still keep you from using the Nest thermostat how you want to. 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 adequate power. You can check 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 be displayed. 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 stemming from an overcurrent. If excessive power is being delivered through the Nest’s wiring, it could damage internal components and can even be a fire hazard. If you notice this error code appear on your Nest thermostat and want to protect from electrical damage, it’s recommended to shut the power off straightaway. You can then get in touch with a professional technician with the necessary experience detecting and resolving electrical damage.
e73 – Critical
When your thermostat displays error code e73, it means that the Rc wire is not receiving power.
This will sometimes be as easy as the breaker being turned off, but it could also be a problem with the wiring. After switching off the power to your HVAC system and thermostat, you can visually examine the wires to make sure nothing is loose or damaged. If nothing appears to be out of place, it’s best to contact a local professional.