Aprilaire 600A with Ecobee4 (using PEK)


Old 10-22-19, 08:49 AM
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Aprilaire 600A with Ecobee4 (using PEK)

Hello all,

I previously installed my Aprilaire 600A whole house humidifier and just recently bought an Ecobee4. I am wanting to integrate the humidifier with the thermostat, but I'm not sure I am finding the right stuff for my application. The thermostat is installed with the Power Extender Kit (no C wire).

I understand I will have to disconnect the automatic humidistat (got the whole unit for a hell of a deal in case someone inquires that I paid more and should have got the M)

My question is, do I need to run a new wire from the furnace to the thermostat since my Ecobee was installed with the PEK (Power Extender Kit). If that is the case, would I pretty much reinstall the thermostat as a C connection rather than use the PEK?

Any help is greatly appreciated. Drawings or diagrams are greatly appreciated as well

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Old 10-22-19, 12:58 PM
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Welcome to the forums.

You are going to need a wire from the humidifier to the ACC+ terminal so running a new cable and eliminating the PKE is highly recommended.
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