Google Nest Learning Thermostat (4th gen) Installation Guide
Reference Material - Wiring Error Quick Reference Guides
Wiring error quick reference guide
If the Nest Learning Thermostat senses a problem with the wiring, you’ll receive an “E” error. These errors must be
fixed before setup can continue. “N” errors are not as critical and setup will continue, but certain features may not
work.
“E” errors related to wires not being detected can be the result of a wire not being fully inserted into the
connector or terminal. Ensure that all wires are fully inserted and the connector buꢀons are in the down
position before performing additional troubleshooting.
Important Note: These errors may change with future soſtware updates. Visit support.google.com for the
latest information.
Error #
Description:
What’s going on?
N401
Power wire Rc detected. Not connected to
equipment.
The Nest Learning Thermostat isn’t electrically
detecting the Rc wire, but one is connected to the
Nest base.
N402
N403
N404
N405
N406
N407
Power wire Rh detected. Not connected to
equipment.
The Nest Learning Thermostat isn’t electrically
detecting the Rh wire, but one is connected to the
Nest base.
No power to W1 wire detected.
No power to Y1 wire detected.
No power to W2/AUX wire detected.
No power to G wire detected.
No power to O/B wire detected.
The Nest Learning Thermostat isn’t electrically
detecting the W1 wire, but one is connected to the
Nest base.
The Nest Learning Thermostat isn’t electrically
detecting the Y1 wire, but one is connected to the
Nest base.
The Nest Learning Thermostat isn’t electrically
detecting the AUX/W2 wire, but one is connected
to the Nest base.
The Nest Learning Thermostat isn’t electrically
detecting the G wire, but one is connected to the
Nest base.
The Nest Learning Thermostat isn’t electrically
detecting the O/B wire, but one is connected to the
Nest base.
86
| General | Details |
|---|---|
| Name | Google Nest Learning Thermostat (4th gen) Installation Guide |
| Make | Nest |
| Language | English |
| Filetype | PDF (Download) |
| File size | 17.85 MB |
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