Maybe your zone controller does not produce enough power to power the zone controller, two ecobees and two dampers.

Any easy fix? I’ve read the same and the fix involved fishing a C wire up the vent but I already have a c wire. 

I’m thinking about changing to Honeywell redlink with a t10 pro. This should definitely... hopefully....easily solve my problems. Thoughts?

Anyone have this combo? I can't get the dampers to open/close with two of these installed. there's air blowing on both floors and both dampers remain open. the dampers do work as I tested it using the panel. Thanks for any advice.

Ecobee 4 with voice (newest) x2 + Hz322 + lennox hvac with honeywell dampers?