Nest error code ‘E298’ is a common error and you may be wondering why it keeps appearing on your screen. There are a number of common causes of this error and solutions available. You can check the following: Y2 wire without Y1 wire or W2/AUX to wire, Clogged dust filter, and no Nest power connector.

Y2 wire without Y1 wire

If you are getting an error message that says “Y2 wire is not connected to Y1 wire” then there are several things you can try. First, you need to determine what is wrong with your wiring. If you are using the thermostat to heat or cool your house, then it is likely you’re not using the right wires.


Another problem that may be causing the error code to appear is a faulty power connector. Changing the power connector may fix this problem. You can also try resetting the Nest thermostat by going to the Nest app and clicking the “reset” button. The status light should go back to solid white.

Y2 wire without W2/AUX to wire

When your car gets this error code, the Y2 wire does not have any power connected to it. This wire controls your cooling system and is commonly connected to the Y terminal on the Thermostat. Make sure you have two Y terminals on your Thermostat if you’re using a two-stage cooling system.


You can try connecting the Y2 wire to the AUX/W2 wire instead. Nest will not recognize the Y2 wire in the 0/B connector. However, if you use a heat pump, you can also connect the Y2 wire to the AUX/W2 connector.

Lack of a C wire or Nest Power Connector

There is an easy workaround for Nest thermostat users who are experiencing problems with the lack of a C wire. A 220 ohm resistor can be added between the W and C wires to increase the power-stealing current. However, this method may not fix the problem completely. In some cases, the Nest will still run out of power during periods of high use. If this happens, you may have to replace the Nest with a standard battery-powered model.

Another solution is to install a C-wire adapter. This will allow you to run the wiring through your wall, but you will have to follow all city and state codes. This way, the Nest thermostat will be able to draw enough power from the home HVAC system to keep it working.

If you want to know which wire is responsible for powering the thermostat, you should unplug the thermostat and look at the wiring inside. You will see that the thermostat has wires that connect to labeled terminals. The c wire will be on one of the terminals labeled “c”. If the terminals are empty, then there is no c wire. Look for any loose wires in the wiring.

When your Nest thermostat is not receiving power, it may display error code E297. If you see this error message on your thermostat, the C wire or Nest Power Connector is missing. In such a case, you need to update the wiring of your thermostat. You can update the wiring under Settings -> Thermostat -> Wiring -> Update Wiring

Clogged dust filter

When your HVAC system encounters a clogged dust filter error code, it can cause your HVAC system to shut off. You can troubleshoot the issue by checking the filter itself or by checking the HVAC system’s fuse box. If you cannot find the source of the problem, you can try contacting a repair company for help.

Incompatible with Nest thermostat

If you’ve noticed that your Nest thermostat is incompatible with your home’s HVAC system, it’s important to determine what the problem is. This error can be caused by a few different things. For starters, it’s possible that the thermostat’s MAC address is incorrect or that the thermostat is not connected to a common wire. If this is the case, it may be necessary to add the Nest thermostat to the whitelist of compatible devices on your router.

Another common cause of this error code is an overcurrent. The thermostat might be getting too much current, which can damage internal components and cause a fire hazard. In such a case, it’s important to shut off the power and contact a Nest technician. A qualified technician will be able to diagnose the problem and fix the thermostat properly.

If your Nest thermostat keeps giving you error codes, you may have a blown fuse or a bad power connector. Fortunately, there are ways to resolve this issue without having to spend hundreds of dollars. You can also try resetting your router to reset its Wi-Fi connection. It’s also a good idea to turn off any cellular data so that you can test your Wi-Fi connection.

If you’re unable to solve this problem, you can try resetting the thermostat to factory defaults. First, go to Settings and select Equipment. You may also want to reset the other settings on the Nest as well.

Misconfigured thermostat wiring

The E298 Nest error code is caused by a misconfigured thermostat wiring. A mistake in wiring can cause the thermostat to use a battery backup system instead of using its main system. To fix the problem, you should check all of the wiring connections and make sure the thermostat is connected to the electrical system with a common wire.

If the thermostat is connected to a common wire, it will not produce the E298 error. Other common causes include a blown fuse or a malfunctioning wire. Fortunately, these problems are fairly easy to fix and don’t require the help of a professional.

Sometimes, the thermostat may simply not be receiving power from the electricity source. If this happens, you can try swapping the batteries to get the thermostat working again. If the problem persists, however, you may need to replace the thermostat with a new one. In the meantime, you should check for loose or broken connections. In addition, you should check the wiring for any other devices that are attached to the thermostat.

The most common cause of Nest error code E298 is a misconfigured thermostat power connector. If you can’t figure out which problem is causing this error, you can visit Google Help Center to find out what you can do. If this doesn’t work, you can also try contacting a professional HVAC professional. They should be able to help you fix the problem.