You have to leave the G wire as a G wire, or remove/bypass the ventilation system. The easiest solution, would be to run a new 5 wire cable.
Can you use G wire for C wire?
If there is no hidden C-wire, you can use a G-wire instead. However, you will not be able to use your fan independently when the heating or cooling isn’t running. Also, many HVAC systems are incompatible with this solution, including: HVAC systems using electric heat.
How do I install Honeywell rth9585wf without C wire?
Youtube quote:Turn your power to the thermostat off at the circuit breaker. Once you've installed the backplate of your new thermostat onto the wall unwrap the wire if it's wrapped around your wire bundle.
Can I use RC wire as C wire?
No the Rc is the red wire. You need 5 wires or more for this to run with all the functions. You can use one of the other wires but you have to drop control of the fan. It will only come on when furnace comes on.
How do I install a smart thermostat without C wire?
Youtube quote:The screws and anchors and the thermostat. We're gonna need a set a screwdriver or a drill. And if you don't have a CE wire. We're gonna use a C wire adapter.
Does Honeywell thermostat require C wire?
A common wire (C-Wire) provides Wi-Fi thermostats continuous power by connecting it to a heating and cooling system (e.g. furnace). C-Wires are required on most Honeywell Wi-Fi thermostats, with the exception of the Smart Round Thermostat (formerly known as the Lyric Round).
How do you substitute C wire for G wire?
Youtube quote:But they should have the same letter designations. Move the G wire to the c terminal at your terminal block. For your system to function properly.
Can I use ecobee without C wire?
Even though it comes with an adapter for missing c-wires, ecobee is what we’d pick even for systems with a c-wire. If you’ve got a 24v HVAC system but no C-wire, check out the ecobee product line. Every ecobee ships with an adapter that you can install yourself at your furnace to make up for a missing C-wire.
How does nest work without C wire?
In a system with a C-wire, the Nest charges itself from the C-wire’s current and all is fine. In a system without a C-wire, though, Nest recharges its battery when the heating or cooling runs. It diverts a little bit of the power to itself and charges its own battery.
How do I find the C wire for my thermostat?
Youtube quote:So it's fairly simple to tell if you have a/c wire or not firstly the purpose of a/c wire is basically for the newer thermostats. As either has a backlit display or has Wi-Fi functionality.
What is a thermostat C wire adapter?
A C wire adapter (common wire adapter) is basically a small electronic device, which re-purposes the existing wiring between your thermostat and the furnace, to add a new wire to the system. This new wire will serve as the C wire or common wire to provide the necessary power to the thermostat.
How do I know if I need C wire adapter?
To check if you have a C-Wire, take your thermostat off your wall to uncover the wiring. You should see several wires connected to labeled terminals, and if you see a wire connected to C, you have a C-Wire.
Where is C wire adapter?
If you install these on a zoned system make sure you install them between the zone control panel board and the thermostat and NOT between the HVAC control board and the zone control panel. Also, each thermostat on the zone system will require a separate c wire adapter.
Is com 24V the same as C wire?
A C-wire, or a common wire, runs from your low voltage heating system (24v) and carries continuous power to your thermostat.
What color is C wire for thermostat?
Blue wires
Blue wires are also called “C” wires because they are the Common wire. C wires are necessary for any “smart” thermostat that needs to be connected to a power source 24/7, regardless of your heat pump type.
