01-15-2024 11:15 PM
So about a week ago it got down to 35°F and all of a sudden we got a heads up alert on the nest app turns out our 1 year old Nest Learning started throwing an E73 error code after 12-15 minutes of heating on each cycle between 10pm-6am outside of those times it works fine. It also worked as normal prior to a week ago no issues no errors on the thermostat. The furnace blower motor will still run but the fan shuts off and the thermostat throws an E73 error after about 1-3 minutes the fan and thermostat comes back up. We have installed a common wire which did not fix the issue. We are currently near -30°F and I can't turn my temp up (running thermostat between 66°F and 67°F) worried it will be worse. Furnace itself is NOT showing any error codes. All components except for the inducer motor, blower motor and limit switches have been replaced in the furnace. Our furnace is pretty basic it is a Nordyne Intertherm
01-19-2024 07:18 AM
Hi Alanahr5,
Uh-oh! The E73 error code on a Nest Thermostat typically indicates a communication issue between the thermostat and the heating system. A few questions:
Keep us posted.
Best,
Zoe
01-19-2024 07:20 AM - edited 01-19-2024 07:24 AM
It was actually the thermostat itself the Rc terminal went bad. Had to replace the entire thermostat. Sucks spent almost $300 at Walmart in October 2022 for it. We have an old basic Nordyne Intertherm and basic old school ac we don't have all of the fancy stuff and our air filter is a hog hair on the door panel that comes off to get to the inside of the furnace
01-19-2024 02:21 PM
Hi there,
Thanks for getting back to us, and I'm sorry for the late response. We're sad to see you go. We're always here to help if you ever change your mind. If you have questions or concerns in the future, feel free to start a new thread, and we'll be happy to help.
Regards,
Zoe