If you have a heat pump system with auxiliary heating, you will normally connect the wire labelled AUX/AUX1 or W2 to the ecobee’s W1 terminal. If you have two stages of AUX heat, connect the AUX2 wire to the ecobee’s W2 terminal.
What is AUX setting on ecobee?
Aux Outdoor Temp Alert: This alert notifies you if the auxiliary heat is triggered on when the outdoor temperature exceeds the selected alert temperature setting. Low Temp Alert: To prevent home damage due to freezing, you can set a Low Temperature Alert. The low temperature range can be from 35 to 68°F (1.5 to 20°C).
What is AUX wire in thermostat?
Some HVAC systems support auxiliary heat (AUX) as well as emergency heat (E).A thermostat senses this and automatically turns on electric heat strips to provide the additional heat needed. Some thermostats have an E wire. The E wire controls emergency heating.
Which wire is aux heat?
X or Aux This terminal is for back-up on a heat pump and allows for auxiliary heating from the back-up heat source usually located in the air handler.
What is W2 aux on thermostat?
O/B Reversing valve for Heat Pump systems. E Emergency Heat. Aux / W2 Heat Stage 2 (Heating) W Heat Stage 1 (Heating)
Where does e wire go on ecobee4?
The E wire normally connects to the ecobee’s W1 terminal.
Why is aux heat on?
Aux heat will kick on when your heat pump cannot deliver enough warmth to heat your home. Typically, your heat pump will energize the auxiliary heat strip inside your secondary heating source to help reach its set temperature faster.
What color is the AUX wire thermostat?
Standard Thermostat Wiring Labels, Wire Colors and Their Functions
| Labels | Colors | Functions |
|---|---|---|
| Y1 | Yellow | Cooling |
| Y2 | Light Blue/Others | 2 Stage Cooling |
| E | No Fixed Color | Emergency Heating |
| X/AUX | No Fixed Color | Auxiliary Heating |
What is RC and RH on ecobee?
The c in Rc stands for cool, the h in Rh stands for heat. The red wire connects to both by way of a jumper bridge. If you look closely at the image, you will see it. The Ecobee3 connects the Rc and Rh terminals automatically which means you can choose either Rc or Rh to plug the wire into.
What is the O B wire?
O, B, O/B: These wires are responsible for switching the changeover valve in a heat pump system. The O wire reverses the valve from heating to cooling, and the B wire switches the valve from cooling to heating. Sometimes it might be a single O/B wire instead of two separate wires.
Is W1 same as W?
W When you see a W terminal, it just means heat. Usually, you will only see W when the control only has one stage of heat. W1 Means first-stage heat. In a heat pump, first-stage heat is the same as the first-stage cool.
What color is W2 wire on thermostat?
| Traditional Thermostat Wire Color Codes | ||
|---|---|---|
| Color | Terminal | Use |
| Light Blue 2 | Y2 | Switched to Cooling |
| White | W | Switched to Heating |
| Brown 3 | W2 | Switched to Heating |
What is the W e wire?
W is just heat/ The E is for emergency heat if applicable. That particular thermostat has the E, many of them don’t. Connect that wire to W on the Nest thermostat. You should be fine.
Does ecobee4 need C wire?
Do you have a C wire connected to your old thermostat? If you have a C wire, it will power your ecobee. You won’t need the Power Extender Kit included in the box. Carefully disconnect and label the wires from your old thermostat one at a time, using the labels provided.
Does ecobee work with stranded wires?
If you have a high-voltage setup, a smart thermostat isn’t going to work. For Ecobee thermostats, 120V and 240V systems (such as baseboard heating) will not work at all.Google Nest also points out that its thermostats won’t work with systems that use stranded wires or stranded wires that are connected by a wire nut.
How do I know if my auxiliary heat is on?
Looking at your thermostat. Aux heat appears as a setting on a wall thermostat. If you don’t see an aux heat enabling switch or an aux heat light on your thermostat, then your heating system doesn’t have it. On the mechanical or equipment side, heat pumps with aux heat contain another section to their air handler.
Why does my heat pump keep switching to auxiliary heat?
Usually, once outdoor temperatures fall below 35°, a heat pump will struggle to keep your home warm and will automatically switch to AUX heat.And when outdoor temperatures drop too low, there’s simply not enough heat in the outdoor air to keep your home warm.
Is AUX heat bad?
Is AUX heat bad? The short answer is no. In fact, aux heat is a critical mechanism that keeps your heat pump properly running when the outdoor temperature drops. Since this type of unit doesn’t work the same as a furnace, it can get cold.
Does ecobee smart thermostat require C-wire?
Your ecobee3 does not need them. Some thermostats do not have a C-wire. The C-wire is used to reliably provide power to the thermostat. In this case, the PEK can use the existing wires to power your thermostat.
Where does Brown wire go on thermostat?
A brown wire is mostly likely a heat pump wire and should be connected to the O/B connector on the Nest thermostat. If the B wire is blue, it should most likely be connected to the C connector.
How do I turn on the auxiliary heat on my Nest thermostat?
Nest Learning Thermostat and Thermostat E
- Press the thermostat ring to bring up the Quick View menu.
- Go to Settings. Equipment.
- Select Continue when the wire diagram appears.
- Select Continue a second time when you find a summary of your system.
- Select Emer. Heat.
- Select Emer.
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