The nest thermostat e is not compatible with dual transformer systems but you may be able to use the 3rd generation nest.
Nest thermostat e installation troubleshooting.
Pull the silver ring of your thermostat gently away from the wall.
The nest apps will show a question mark over the thermostat when the nest servers can t communicate with the device.
Your customer is seeing a question mark on their nest when they use one of the nest apps.
Get a c wire or install an adapter if you want a nest.
If needed re insert wires so that the connector button stays fully pressed down.
The nest thermostat doesn t need jumpers.
Run new wires between your furnace and your thermostat hire a pro or diy with a new spool of thermostat wire grab a venstar add a wire which adds a 5th wire to an existing 4 wire setup.
These illustrations use the 3rd gen nest learning thermostat but the steps are the same for the nest thermostat e.
If your thermostat has jumpers remove them but save them along with your old thermostat.
Check that all connectors that have wires are down see picture.
The nest app will guide you through thermostat installation but here are some more detailed instructions to walk you through everything you need to do to install your nest thermostat on the wall.
If all your nest thermostat displays is a black screen and won t turn on try the steps below to troubleshoot the problem.
If you ve successfully installed your nest thermostat but a blinking red light appears after you ve been using it regularly for some time there may be a problem.
Your nest thermostat has detected a g 2 fan wire in the y 2 connector and an emergency heat wire in the connector.
Pull off the nest thermostat display.
Basically you have two options if you want to ensure your nest installation is solid.
Installation guide 6 pages 0 3mb welcome guide 10 pages 1 7mb 1st generation nest thermostat.
Installation guide 7 pages 0 5mb note.
Installation guide 11 pages 0 5mb 3rd generation nest thermostat.
Use normal electrical troubleshooting techniques to isolate the issue to either the fuse breaker box or a fuse on the hvac controller board.
Installation guide 12 pages 0 3mb welcome guide 2 pages 0 6mb 2nd generation nest thermostat.
