Replaced honeywell system with nest

[Willydoe]

Wired my system but there is an E73 error message no power to system 

[MelbaDT]

Hi @Willydoe, 

Thanks for reaching out and sorry for the delayed response here. I want to check if you still need help with your Nest thermostat. 

E73 means no power to Rc wire detected. Has this thermostat worked before with your HVAC system or is this a first time setup? Also, could you make sure the power to your system is on. The power switch will usually be in your breaker box or fuse box, but in some homes it will look like a light switch near the heating or cooling equipment. If it is, please check that the wires are inserted correctly in the thermostat. You may also take a look at this link for the complete troubleshooting guide. 

Keep me posted. 

Best, 

Melba

[GarrettDS]

Hey there,
Just wanted to see if you still needed help. Please let us know if you have any other questions or concerns.

Best regards,
Garrett DS

[Jake]

Hey Willydoe,

I wanted to check in and see if you are still in need of any help? Please let me know if you are still having trouble, as I will be locking the thread in 24 hours due to inactivity. 

Best regards,
Jake

[Jake]

Hey Willydoe,

It has been a few days since the last reply, and I am going to lock the thread at this time. If you have any questions, please feel free to create a new post. 

Best regards,
Jake