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2. To change Rh to Rc:
1. Turn off the heating/cooling system.
2. Disconnect the wiring from Rh.
3. Connect the wiring to Rc.
4. Power on the heating/cooling system.
3. Check the C-wire.
1. Turn off the power to your HVAC system.
2. The thermostat must have a C-wire. If you installed a
CWA, the old G-wire will become the C-wire. Don't
worry, you won't lose independent fan control.
3. Ensure C-wire and Rc-wire is properly installed at the
thermostat.
4. Sometimes the C-wire in your old thermostat is
unused, even if it is plugged into the C-terminal on your
old thermostat. If you have R (or Rc), G, W, Y (or Y1)
and unused C (or no power running through), you are
likely to fall into this case. To make it work, you can try
one of two ways:
1. Remove the C-wire at the thermostat, restart
the installation process without selecting
C-terminal and follow the app to install the
C-wire adapter.
2. Identify the C-wire coming from the thermostat
at the control board and wire it to the control
board C-terminal. Identifying the wire can be
challenging, we recommend the assistance of
an HVAC professional. Ensure the power is off
at the circuit breaker, before starting.
2. If you have installed C-Wire Adapter (CWA)
1. Turn Power off
2. Ensure C-Wire Adapter is properly installed
1. Review your photo of the old control board
wiring and ensure the labels were applied
correctly. Do you have an extra wire in one of
the control board terminals (R-G-W-C)?
2. Check that the correct wires are connected to
the CWA.
3. Double check the correct CWA wires are
connected to the control board.
4. Check all connections are secure and screws
are firmly tightened.
3. Check the equipment cover has been reinstalled (some
have kill switches there)
4. At the thermostat: If the C-Wire Adapter is installed, the
G-wire is used as the C-wire now. Ensure old G -> new
C.
Heating or cooling system isn’t responding
If the thermostat is powered on and heating/cooling is engaged but
your HVAC system is not responding:
1. Turn off the power to the HVAC system.
2. Check your wiring at the thermostat, ensuring that each wire is
secure
○ Also check the wires at the control board, ensuring
each wire is secure
3. Turn the power back on and go through testing the system
(testing can be found under Settings > Advanced > System
Test).
4. If you continue to have issues, restart the reinstallation
process.
System Testing results are inaccurate
Upon completing testing, your system shows results similar to the
image below.
The system returns "Not Tested" even after being given a "Yes"
response during the testing phase. This is due to a communication
delay between Wyze Thermostat and the app. This result should
not raise any concerns and can be ignored.
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