User Manual Q&AAnswer
Jan 01, 2025 - 05:52 AM
If you don't have a C wire, the comes with a Power Extender Kit (PEK) that allows you to reliably power the thermostat. Here's how you can install the thermostat without a C wire:
1. Take the Power Extender Kit, wire labels, tools, your smartphone, and go to your HVAC system.
2. Open your HVAC system's cover to reveal the control board. Please exercise caution as HVAC systems contain high voltage wires.
3. Take a picture of the wires connected to your control board for reference.
4. Label only the R, Y or Y1, G, and W or W1 wires with the matching labels provided. If you have more than one wire going into these terminals, only label those going to your thermostat.
5. Disconnect the wires labeled R, Y, G, and W from the control board.
6. Connect the wires you disconnected from the control board into their matching gray terminal blocks on the Power Extender Kit.
7. Tug on the wires gently to ensure they are securely connected.
8. Connect the five white wires coming out of your Power Extender Kit to their corresponding terminals on the control board.
9. Tug on the wires gently to ensure they are securely connected.
10. Mount the Power Extender Kit inside your HVAC system, taking care not to strain the wires. Close the HVAC cover panel securely.
11. Back at your thermostat, carefully disconnect and label the wires from your old thermostat one at a time, using the labels provided.
12. Unscrew the mounting plate of your old thermostat to remove it from the wall.
13. Decide if you want to use the trim plate with your ecobee. If using the trim plate, align the mounting holes on the trim plate and backplate and press them into place together.
14. Pull the wires through the hole in the middle of the backplate and then attach it to the wall using the drywall anchors and screws provided.
15. Remove the Rc, C, and PEK labels from the label sheet and attach them to the wires as instructed.
16. First, connect the RC, C, and PEK wires. Then, connect any remaining wires to their corresponding terminal.
17. Tug on the wires gently to ensure they are securely connected.
18. Carefully push any excess wires back into the hole and ensure there are no drafts coming from the hole(s) in the wall.
19. Gently press your ecobee into the backplate until it 'clicks' into place.
20. Turn the power to your HVAC system back on using the master switch or at the circuit breaker box.
Congratulations, you have successfully installed your ecobee SmartThermostat without a C wire using the Power Extender Kit.
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