Google Nest error E78

When you try to use Nest on a different device or when you try to use Nest outside of its official application, then you might encounter error code e78 on your device’s screen. This error can occur because there is an issue with your device or because there is an issue with the Nest app itself. You might also encounter this error if you are trying to use Nest with a thermostat or an air conditioner that was not made by Nest or compatible with it.

In this article, we will be showing you how to fix this error code E78 and how to resolve the issue. We will also be giving you some information about this error and how it can be prevented in the future.

When a device encounters an error, it can do several things. It can do something like shut down or restart itself in order to correct the problem. However, it can also display an error message on its screen or send an error code out of its own to tell other devices that there is a problem with the device itself. This is exactly what happened when your Nest thermostat encountered this error code e78 and told other devices that there was a problem with your device.

The E78 code usually refers to an incorrect wiring with the device's system. In this case, the issue might be with the wiring of your thermostat. This error code can also refer to a problem with the wires or any other part of your device that connects to the thermostat. Since this is hard to fix by yourself unless you’re handy, and the solution might differ on a case-by-case basis, it might be best to call customer support for some pointers on how to fix this.