E104 error w/no change to system

[libraryfox]

Nothing is wired wrong & wires are all good. Outside unit is only 2 years old. The only thing that I can think of being different is that we have had quite a heatwave. I've tried resetting the thermostat. I've read every troubleshooting article I can find & tried everything I could think of. I just know I woke up in the middle of the night to the e104 code out of nowhere! 

[zoeuvre]

Hi libraryfox, 

Thanks for bringing this to our attention, and I'm sorry to hear about the situation. Please answer the following below: 

1. What type of Nest thermostat do you have?
2. What is the make and model of your heating, ventilation, and air conditioning (HVAC) equipment?
3. How many wires are there?
4. How are they labelled?
5. Are the power breakers on and are you receiving power to your home?
6. Are all the wires firmly seated into the terminals? (No loose, or exposed wires)
7. Does the thermostat charge with a USB cable?
8. What is the power reading of your thermostat based on its Settings > Technical Info > Power?

I'll look forward to your response. 

Best,

Zoe

[zoeuvre]

Hi there, 

I want to check and see if you are still in need of any help. Please let me know, as I would be happy to assist and answer any questions you may have.

Thanks,
Zoe

[Jenelyn_O]

Hey libraryfox,

Chiming in — due to inactivity, we'll go ahead and lock this thread in 24 hours. We'd be glad to help you further so if you still need assistance, feel free to start a new thread.

I appreciate the help, Zoe.

Regards,

Jenelyn