I picked up a Honeywell Z-Wave thermostat and went to replace my current LCD programmable thermostat. Only difference in the wiring was the need for the C line 24V. I pulled the couple extra wires out of the wall (old unit was battery powered), tested with my voltmeter, found the line, I removed the plastic for the small battery, and hooked up the wiring to match the old unit and the new unit’s wiring diagram for 1 unit cold/1 unit heat.
Except, the thermostat won’t turn on at all. Not a glimmer of life. Anybody have any suggestions? I’ve heard getting RAs from Honeywell is problematic as they require installation by a professional so I’d rather exhaust all my resources first. And this forum is most definitely a resource.