
Online Guides and Support
Remove your old thermostat from
This product provides a C wire (common wire) to power a
thermostat. Only install if you do not have a C wire available to
connect to your thermostat.
to reveal the control board.
Take a picture of the wires
Ensure the terminal labels
and wires are in the image.
You may need to reference
O or B terminal may also be used.
Use stickers to label the
following connected wires:
Disconnect ONLY the wires
ZONING CONTROL PANEL CHECK
For zoned systems, install the C Wire Adapter
between the thermostat and the zoning panel, NOT
between the zoning panel and HVAC equipment.
Take a picture of the wiring.
Ensure the terminal labels
and wires are in the image.
You may need to reference
Confirm that you do not have
a wire in the C terminal. If
C terminal, then you do not
Look for an unused wire. If
then you do not need this
product. Connect one end of
that wire to C terminal at the
terminal at new thermostat.
The C wire (common) might be
labeled as B rather than C on certain
Go to your HVAC system. It may be located in your
attic, crawl space or basement.
Not all systems will have a
W or W1-wire. On a heat pump
application, the wire coming from
O/B on the old thermostat would
match to either O or B at equipment
If multiple wires are connected
to a terminal, only label the the wire
running to your thermostat.
Do NOT disconnect wires that you
If multiple wires are connected
to a terminal, only remove the the
wire running to your thermostat.
On a heat pump application,
the wire coming from O/B on the old
thermostat would match to either O
or B at equipment rather than W.
*Heating, ventilation, and air conditioning
CAUTION: ELECTRONIC WASTE NOTICE
The product should not be disposed of with other
household waste. Check for the nearest authorized
collection centers or authorized recyclers. The
correct disposal of end-of-life equipment will help
prevent potential negative consequences for the
environment and human health.