Even though Ecobee does not require a c-wire, you still need to have a 4-wire thermostat cable because they require a power extender kit. You will connect the wires from your furnace to the power extender kit and then to the thermostat.
What color is C wire on thermostat?
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.
What if there is no C wire for thermostat?
If your current thermostat didn’t need a C-wire, it (or a wire that can be used as a C-wire) might be rolled up inside the wall. This is more likely to be true if you see all the other color wires present. Line voltage thermsotat scenario: you have just two wires (white and red, probably), and they’re thick.
How many thermostat wires do I need?
The most basic thermostat has 2 wires; usually a red and a white wire. Two wire thermostat wiring is used for furnaces only and usually doesn’t need a “C” or “Common” wire. That’s why we only need two wires: Red wire for power (24h).
Does ecobee need a transformer?
ecobee thermostats are compatible with systems that use zone valves. There typically won’t be enough power to support multiple smart thermostats, so you may need to add an 24V transformer and an isolation relay.
Does ecobee need a jumper?
Note: Do not jumper Rc or Rh, ecobee3 does this automatically. R can go into either Rc or Rh terminals on your ecobee3.
What is C wire?
What is a 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).
Why is there a jumper between RC and RH?
In most cases, the heating and cooling system share a single transformer by leaving the jumper in the lower right corner it connects the RC and RH to power heat and cool features.
What’s the difference between RH and RC on thermostat?
RC: The RC terminal is the 24-volt cooling power supply. RH: The RH terminal is the 24-volt heating power supply. (Note: The RC and RH terminals are jumpered together in a four-wire heat/cool system and a single-stage heat pump system but not in a five-wire heating/cooling system.)
Why are jumpers W1 and W2?
It just means the contactor/compressor is turning on. Whether that is heat or cool is actually dictated by whether or not the O/B terminal is energized. That is why, on many old thermostats, you would jumper Y1 and W1 in a heat pump application. W2 – Means second-stage heat.
Is RC the same as C wire?
Hi there! The C and Rc wires are not the same. To install this thermostat you should follow the exact same wiring of the previous thermostat.
What is the blue wire for on a thermostat?
Blue wires are for heat pumps. This wire connects to terminal B on your thermostat.
