E298 error no power

[Mzunnurain]

I have E298 error. 
Fresh batteries are installed. Why are the backup batteries not providing the needed power?

[moralesvicente]

Hello Mzunnurain, 

Thank you so much for posting in this community. I understand you’re experiencing a power issue with your Nest Thermostat, indicated by error code E298. No worries; it’s a pleasure to assist you. 

Regarding this error code (E298), it may be caused by possible causes, such as a bad power connection, trouble with a specific wire, an improperly grounded common wire, or the system not providing enough power.

To provide you with accurate troubleshooting steps, I would appreciate your assistance in answering the following questions:

• What model of thermostat do you have? For your reference, check out this article: How to tell which Nest thermostat you have. 

• When did you first notice this issue?

• Could you please share a picture of your thermostat's wiring?

• Have you already tried any troubleshooting steps?

• Can you check if your power source is sending power to your thermostat? 

If you have any additional information that might be helpful, please let me know.

Regards, 

Daniel

[Mzunnurain]

The compressor is overheating cutting off power. 

[moralesvicente]

Hi Mzunnurain, 

Thanks for keeping me updated. Regarding the situation you’re experiencing with your compressor, it’s overheating and cutting off power. I strongly recommend you contact a technician to get professional assistance about this behavior and provide you with a proper diagnosis. You can find information on how to contact a technician in this article: Professional installation and service.

If you have more questions, please feel free to write in this post. 

Best regards, 

Daniel