Operating a Nest thermostat is one of the best ways to optimize the daily schedule of your comfort system. This smart thermostat can be taught your preferences and automatically make changes. But as you may expect, it won’t work properly or at all if you see an error code show up. The specific error code offers useful information about the root of the problem, something a trained technician can use to present solutions that much quicker.
Let’s consider seven of the most common error codes you may discover on your Nest thermostat. We’ll explain the basics of each error code on top of how you might solve it and the approximate cost to do so. Don’t forget that while the investment will ultimately hinge on the specific Nest model, you can expect to pay between $75-$200 for repairs. This should also cover travel and labor costs along with any specific components required to complete repairs.
e298 – Critical
This critical error code is limited to the latest 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 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 a number of reasons. The wiring might have disconnected or become damaged, or a disconnection could have appeared further along in your home’s electrical system. This might be the circuit breaker, fuse box or system switch. A knowledgeable technician will examine electrical connections and wiring until they find the root 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 complete a factory reset of your thermostat to ensure it’s not just a software error. If that doesn’t work, they’ll examine the wiring diagram of the thermostat and begin inspecting connectors.
They’ll disconnect the power and gradually inspect each wire, seeing to it that they are fully inserted into the connector with the proper amount of uncovered copper. After they pinpoint the problem connector, it can be replaced for a new one.
e195 – Critical
This critical error code can surface when the weather outside is severely hot. The HVAC system can break down and stop giving power to your Nest thermostat. When this problem lasts, the backup battery in your thermostat depletes and the thermostat will subsequently turn off. Assuming the breakers are on, you can inspect a few other places before consulting a professional technician.
As this error can consume your thermostat’s battery, the first step may be restoring enough power to determine if this specific error code is what you’re working with. You can detach the thermostat from its base and supply power through a USB cable. In the event it displays error code 195, you can continue to visually inspect 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 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 receiving 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 defective connection in the thermostat. A technician will meticulously 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
Although 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 the absence of one can block your Nest from obtaining 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 can get a Nest Power Connector.
During installation of a Nest Power Connector, you might notice error code E297 be displayed. This can be dealt with 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 too much power is being delivered using the Nest’s wiring, it can damage internal components and can even be a fire hazard. If you notice this error code show up on your Nest thermostat and want to guard against electrical damage, it’s a good idea to shut the power off as soon as you can. You can then contact a professional technician with the appropriate experience diagnosing and resolving electrical issues.
e73 – Critical
When your thermostat displays error code e73, it means that the Rc wire is not getting power.
This could be as straightforward as the breaker being shut off, but it can also be an issue 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 looks to be out of place, it’s time to speak with a local professional.
