What is the K Terminal and what to do with it?

The K terminal located on Honeywell thermostat's combines the Y and G wires. It does this using the Honeywell wiresaver. The Degrii system is not compatible with the Honeywell wiresaver. However, your system is compatible with Degrii thermostat once the Honeywell wiresaver is removed. Please follow the following steps to install your Degrii thermostat.

1. Take photos of your control board, thermostat wiring and Honeywell wiresaver.
2. Remove the Honeywell wiresaver

At the Control Board
3. On the ""Thermostat"" side of the Honeywell wiresaver, label the wires as follows.
a. Rc terminal -> Rc Label
b. K terminal -> Y Label
c. C terminal -> G Label
d. W-O/B terminal -> Please follow the W-O/B terminal wire from the wiresaver to the control board. Label the wire on the thermostat side of the wiresaver corresponding to the terminal label found on the control board.
NOTE: If the control board is also labeled W-O/B. You will need to determine if your system is heat pump system(O/B) or conventional(W).
4. With wires correctly labeled remove the wires from the wiresaver.
5. Now remove the wires from the control board connected to the wiresaver.
6. Wire the labelled wires to their corresponding terminals on the control board.
NOTE: You may notice you no longer have a C-wire, don't worry they will walk you through setting up the Degrii CWA.
7. Correct the thermostat wires

At the Thermostat
1. Remove the thermostat cover panel (Your wiring should be similar to the wiring on the above left side photo).
2. To be compatible with the Degrii thermostat, wires K and C will need to be adjusted.
3. Place the wire in the C terminal into the G terminal.
4. Place the wire in the K terminal into the Y terminal.
Your system is now compatible with the Degrii thermostat. Please open the Degrii app and add a new thermostat. Select the wires currently connected in your system and the App will guide you through how to connect the Degrii C-Wire Adapter.