Get a c wire or install an adapter if you want a nest.
Nest thermostat e installation troubleshooting.
If all your nest thermostat displays is a black screen and won t turn on try the steps below to troubleshoot the problem.
The nest thermostat doesn t support a multi speed fan and.
Pull off the nest thermostat display.
Your nest thermostat has detected a g 2 fan wire in the y 2 connector and an emergency heat wire in the connector.
Use normal electrical troubleshooting techniques to isolate the issue to either the fuse breaker box or a fuse on the hvac controller board.
Check that all connectors that have wires are down see picture.
Installation guide 12 pages 0 3mb welcome guide 2 pages 0 6mb 2nd generation nest thermostat.
Pull the silver ring of your thermostat gently away from the wall.
These illustrations use the 3rd gen nest learning thermostat but the steps are the same for the nest thermostat e.
If needed re insert wires so that the connector button stays fully pressed down.
The nest thermostat e is not compatible with dual transformer systems but you may be able to use the 3rd generation nest.
Installation guide 11 pages 0 5mb 3rd generation nest thermostat.
Installation guide 6 pages 0 3mb welcome guide 10 pages 1 7mb 1st generation nest thermostat.
If you have rh and rc wires you have a dual transformer system.
Your customer is seeing a question mark on their nest when they use one of the nest apps.
Basically you have two options if you want to ensure your nest installation is solid.
If your thermostat has jumpers remove them but save them along with your old thermostat.
The nest thermostat should pop off the base.
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.
The nest thermostat doesn t need jumpers.
The nest apps will show a question mark over the thermostat when the nest servers can t communicate with the device.