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  1. ecobee Support
  2. Thermostats
  3. Thermostat Installation & Wiring Diagrams

I currently own an ecobee3 and use a Power Extender Kit (PEK). Can I use the same PEK for the ecobee3 lite or ecobee4?

Unfortunately, the PEK for the ecobee3 lite and ecobee4 is different from our original ecobee3 PEK and you wouldn’t be able to use the same one. However, both the ecobee3 lite and ecobee4 come with a PEK included in the box for installation without a C wire. 

 

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