Installing a Nest thermostat is one of the easiest ways to perfect the everyday schedule of your comfort system. This smart thermostat can be taught your preferences and automatically make adjustments. But as you can expect, it won’t work properly or at all if you see an error code appear. The specific error code provides useful information about the underlying problem, something a professional technician can use to present solutions that much quicker.
Listed below are seven of the most likely error codes you might encounter on your Nest thermostat. We’ll walk you through the basics of each error code as well as how you can address it and the projected cost to do so. Keep in mind that while the investment will ultimately be dependent on the precise Nest model, you can expect to pay around $75-$200 for repairs. This should include travel and labor costs along with any specific components needed to finish repairs.
e298 – Critical
This critical error code is limited to the latest models of the Nest thermostat and shows up when the power is shut off. As this is a critical power error, the thermostat will switch to the backup battery system. The error message will remain on the screen 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 could have happened further along in your home’s electrical system. This could be the circuit breaker, fuse box or system switch. A certified technician will check electrical connections and wiring until they find the source of the problem.
e294 – Critical
Critical error code e294 shows up when your Nest thermostat’s wiring has to be reconfigured. More specifically, the technician should reconfigure the R wire. They’ll first perform 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 looking at connectors.
They’ll shut off the power and progressively look at each wire, making sure they are fully attached into the connector with the proper amount of bare copper. When they locate the problem connector, it can be exchanged 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 persists, the backup battery in your thermostat drains and the thermostat will eventually shut down. Assuming the breakers are on, you can search a couple of other places before calling a professional technician.
Since this error can deplete your thermostat’s battery, the first step could be supplying 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 through a USB cable. If it reveals error code 195, you can continue to visually check components like the wiring as well as your air conditioner’s air filter or drainage system. If you don’t find anything wrong with these components, it’s maybe best to get in touch with a pro.
e103 – Critical
Another critical error code, e103 indicates 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 necessary. This may stem from the breaker box, an error from the control board or thanks to a defective connection in the thermostat. The technician will cautiously investigate 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 how you prefer to. Error code n260 pertains to the lack of a C wire or Nest Power Connector, as the absence of one can block your Nest from obtaining adequate 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 can get a Nest Power Connector.
With installation of a Nest Power Connector, you may notice error code E297 appear. This can be dealt with by updating your thermostat in Settings -> Software -> Update. If the Power Connector was 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 originating from an overcurrent. If too much power is transported inside the Nest’s wiring, it could damage internal components and could even be a fire hazard. If you see this error code appear on your Nest thermostat and want to protect from electrical damage, it’s recommended to turn the power off as soon as possible. You can then get in touch with a professional technician with the appropriate experience identifying and fixing electrical malfunctions.
e73 – Critical
When your thermostat displays error code e73, it signifies that the Rc wire is not receiving power.
This may be as easy as the breaker being switched off, but it could also be a problem with the wiring. After turning off the power to your HVAC system and thermostat, you can visually examine the wires to make sure they’re not loose or damaged. If nothing seems to be out of place, it’s time to get in touch with a local professional.