Gen 3 E74 code no power to Rh

[Pranav]

Gen 3 E74 code no power to Rh 

first I saw low battery message and then thermostat went out

i I recharged the battery and plugged it back to the base now seeing E74 code no power to RH

i reset the thermostat to start fresh and rebooted several times no luck so far

the device is 5 years old and never had any issue so far 

[maedacortez]

Hi Pranav,

Thanks for reaching out. I understand your Nest Learning Thermostat 3rd Gen is displaying the E74 code, which indicates no power to the RH wire. I know it's frustrating when your thermostat isn't working properly.

To help you solve this situation, I've included a link to guide you on "Troubleshooting thermostat power issues during hot weather (E3, E4, E23, E24, E73, E74, or E195 help...). This guide provides step-by-step instructions to identify the potential cause of the problem.

Please let me know if you have any other questions.

Regards,
Manuel

[Pranav]

Thanks Manuel, got it fixed. It was a faulty wiring on the condenser pump which did not allow power from HVAC to the thermostat.