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Nest Error E105 on 3 year old unit

alvie463
Community Member

I am at a complete loss as to what to do here. I have a Nest Learning Thermostat that has been in my home and functioning properly for the past 3 years. Out of no where today I got an E105 error and the A/C will not come on and the heat is blowing non-stop. I have attached pictures so you can see what I am seeing here. I have rewired all wires and made sure they are sitting in there spots snuggly. Has anyone else had this issue and what was the fix to make it all work normally again?

Thank you in advanceIMG_4049.jpgIMG_4048.jpgIMG_4050.jpgIMG_4051.jpg

4 REPLIES 4

Patrick_Caezza
Platinum Product Expert
Platinum Product Expert

When was your HVAC last serviced?

EdwardT
Community Specialist
Community Specialist

Hi folks,

 

@Patrick, thanks for the help!

 

@alvie463, how's it going with your Nest Thermostat? Still need our help?

 

Thanks,

Edward

EdwardT
Community Specialist
Community Specialist

Hi alvie463,

 

It's me again. I wanted to check back in to see if you have other questions and concerns. Feel free to let me know if you do. 

 

Thanks,

Edward

EdwardT
Community Specialist
Community Specialist

Hi alvie463,

 

Just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

 

Thanks,

Edward