If you have a multimeter you can test the voltage between rc and c at the ecobee anything less than 24 vac is insufficient.
Ecobee power extender kit replacement.
Install power extender kit pek some thermostats do not have a c wire.
Ensure your wire and terminal connections in the power extender kit are secure if you installed the power extender kit make sure you inserted the wires into the correct terminals.
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The ecobee power extender kit uses the power stealing technology meaning that it will try to steal as much energy as it can from the hvac control lines to recharge its batteries.
R rc rh wire rc terminal.
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If you are not comfortable.
Use the power extender kit to simplify your ecobee installation.
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The ecobee draws power from the furnace so any disruption to this power source will result in a loss of power at the thermostat.
A common wire c is required for 5 wire thermostats.
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The c wire is used to reliably provide power to the thermostat.
Installing your ecobee thermostat with the power extender kit no c wire if you re lacking a c wire and have at least four wires at your thermostat to work with refer to this article if you only have two wires you ll want to install the power extender kit pek.
Check for the following.
How can i troubleshoot.
In this case the pek can use the existing wires to power your thermostat.
Ecobee smartthermostat with voice control smartsensor included.
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Installing your ecobee thermostat with the power extender kit no c wire my air conditioning won t turn on.
The pek gets installed at your furnace control board and is wired in with.
Threshold settings for ecobee thermostats.
The thermostat gets more energy when the system is off and gets less when it s running meaning that the chances of failure are higher if your ac is almost ever running.
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